For me this would look as follows: (I try to judge the manga first and foremost, at least with the original DB, with anime versions affecting the scores but not by a large margin)
Original Dragon Ball
Tenkaichi Budokai 23 - S
Though not a typical saga but a tournament one, I feel by this point Toryiama perfected the formula. We have all here... Humor, martial arts, big bad boss, hero interactions, Goku being a genius fighter... The only thing which I can think off, I am not a fan off is lack of kid Goku as he's my favourite og Goku version but this can also be seen as a plus in that DB has shown then it is willing to go forward.
22 and 21 Tenkaichi Budokai exequo - S-
Both of them I do enjoy and both of them have specific pluses for me. The 22 one is generally more serious and has a bit more tension then the 21 more light-hearted one. On the other hand 21 gives us a fantastic training arc, Krilin, funny gags and even some wisdom and it's the turning point in which DB becomes less "funny things" and more "martial arts".
Pilaf saga - A
I can't help but adore this saga. Not only everything stared here, not only is the adventure funny, whimsical, colorful and magical, it also gives us a pletora of likable - but not perfect characters.
The anime version is just as fun and has none of the pacing issues that will plague the series moving forward. Great music. Great animation.
Red Ribbon saga - A-
I feel this could be very well be objectively the BEST saga DB has to offer with various characters, villains, locations, twists, story beats. It gives us battles, it gives us the first super villain, it gives us more Dragon Balls, it frickin gives us Arale and Gohan. The only thing that drags it down for me is that it is a bit too long for my liking (in comparison to the rest of the sagas). This isn't a big deal though, the anime however has a bigger problem as it's right here where they slowed the pacing down and some scenes are veeerry tiring.
Piccolo saga - B+
While I like the dark atmosphere of the whole saga, I can't ignore that so much story beats are reapeted from RR saga. They're twisted in new ways, sure and the conclusions is different but we have a sense that we've been there, done that. Still this doesn't make the saga bad, just not as superb as the others.
Z era
Saiyan Saga - S
This is personally my favourite saga from that era. The whole concept of having these superpower aliens threatening the planet and we have a year to get ready makes it very exciting.
I like Gohan's character, his growth, Piccolo's change. After that we have the third act of sheer horror of our characters getting slain by the sayians which is followed by the best fight in the series in my opinion.
Namek Saga - A+
This is one of the most beloved sagas and for a good reason. The storytelling and writing is tight and has three parties which we can follow, which also shows Toryiama's growth as a storyteller.
I do however feel there are some inconsistencies near the end... The whole story was about Gohan, Krilin, Vegeta, then it's all about Goku in the end.
The zenkai boosts are also absurd and not very well integrated in the story (even if Goku one shooting foes is very satisfying).
The anime version does get a few points down due to the pacing, absolute worst filler in DB history and very poor animation in places.
Android/Cell saga - B+
The sheer chaos and unpredictability of this saga makes this sometimes hectic but on the other hand Toryiama has a great talent in tying up random ideas and masking them as a planned story.
We started the saga with Frieza vs the boy from the future warning us about 2 superpower androids and ended with Gohan fighting a bug monster.
The story bits and twists are interesting but character progression is a bit hit and miss.
We have Piccolo becoming one with Kami only for him to be not existent a few chapters ahead.
We have Gohan becoming a centre of everything from nowehere
I think a bit planning would made this saga the best in Z.
Buu Saga - B-
The chaos of a story is like Cell on steroids. The villain rarely stays the same after a good chunk of chapters and so does the main hero (you could even call it the hero of the week

)
Still, I like the more gag heavy Toryiama style even if it doesn't always hit the mood.
Also this saga still brings us very iconic set pieces... Vegeta' sacrifice, fusion etc
And even if chaotic, I do enjoy an ever evolving story in DB... Something we never get again in Super nor GT...
Unfortunately Toryiama's exhaustion is showing. While to this point, anime look was on a rollercoaster, the manga was always solid and beautiful, here though we can see some creaks and cracks.
Not the best but certainly not a bad saga.
Garlic Jr, anime only - D
While having some original story beats and clever solutions, it is really a bunch of nothing.
The viewer can tell it was made only to stall for time. But at least the animation is on par if not better than Namek
Grand Tour time
Baby Saga - A-
I feel we can agree this is the best GT has to offer. Bringing back Tsufulians was a VERY good idea even if copied after Plan to Eradicate...
The whole atmosphere of the arc is the best thing of it. Oozaru, SSJ4, Baby taking Vegeta - this is all good writing.
Unfortunately the other half of the writing is not so good with Goku being the only main hero who makes a difference, Uub being completely forgotten, Baby becoming a typical villain when he could have been so much more. The choreography is boring and the graphics sometimes feels off. Still, as far as GT goes, it isn't the worst.
Shadow Dragon Saga - B-
The idea for the arc is pure genius. It's not executed that well unfortunately. Half of the dragons are just the typical monsters of the week, nuova and ice shenron are typical good guy/bad guy and omega becomes yet another final boss without anything special about him. The cast is underutilized, the dragons motivations make no sense and everything isn't as great as the saga would make you believe.
Still, points for the best ending in DB history.
Black Star Saga - C+
I really want to like and give points to this Saga. I want to appreciate it.
And I do in some ways. The cast is fun. The music is great. Animation is great. But the humor and adventures always feel somewhat lacking. It feels a Toryiama-like story while clearly not Toryiama.
Going to this straight from Z feels like a big devolution because of the adventure formula and Goku being chibi again and the viewer can't shake it.
For some bonus points, I, for one, like the slow villain reveal. While we indeed have a bit too many twists, this is a new one for DB.
Android 17 Saga - F
Really a big bunch of nothing. Sadly, the idea is bad, the villain is boring, characters are not in character and the potential it could have, quickly goes away. Also it's over before you blink which could actually be a plus in this regard.
Super Duper
Broly Movie - S
Broly is Super in its peek for me. The characters, the story, animation, drawing. It's at its best. Music is great and while I know the movie will always look better than a TV show it's the style of animation, not really the budget, that makes it that much better than the rest of the series.
The story isn't very deep or creative but it's presented to us in a very enjoyable way. It very much gives us DB past and nostalgia (but not in a bad way like ToP or Super Hero do) and mixes it with modern DB. Broly is A LOT better character than what Toei made in Z days.
BoG Movie - S-
A lot of the same really applies here. BoG is like a celebration of all things DB related after 20 years.
I love the characters, I love Pilaf, I love Beerus.
The only thing dragging it down is the fighting which, when all is said and done, isn't really that special and the beginning of stupid Goku, which I am not a fan off.
RF Movie - A
People tend to hate that movie but I really always had a soft spot for it.
Moro arc - A-
Of all the arcs in Super I feel this one is the most true to what DB is. We have a new villain, various locations, all the cast doing stuff, throwbacks to Z, twists along the way. It's not perfect and sometimes it copies something a bit too blatantly (Cell? Senzu?) but it's an okay arc by itself and one of the better in Super.
Granolah - B+
The first half is a very good crafted story. Minus maybe gathering the Dragon Balls in 2 chapters or so.
After that however I feel it loses focus. The Bardock stuff is interesting but it doesn't go anywhere really.
I know we needed a second villain but Gas doesn't really sell it that much.
As for Black Frieza, while cool, it was pulled out of nowhere and because it was so many years without doing anything with him, that feels pointless now...
Super Hero Movie - B
An okay movie for Dragon Ball. Doesn't really do that much for me but also doesn't offend me in anything. I am not a fan of Gohan Beast and Cell Max, I do however like the RR stuff and the animation.
Zamasu Saga - C+
This one is easily the best for me in Super's anime run. The atmosphere is lovingly haunting and the story of a God going rouge is interesting.
On the other hand why do so many things feel half cooked? Why is Zamasu turning into another monster of the week when he could have been so much deeper? Why do we get nonsense like Trunks Rage? Why do we need to drop tension with the fact we're constantly going back and forth? Why does one of the best rage moments Goku ever had is over before it begins? Why did the ending feel so unsatisfying?
If I was too judge only the manga version it would be a bit higher. I felt it had a lot less nonsense, had a better conclusion and the writing for Black was tighter. The anime has outstanding music though.
Universe 6 Saga - C
I thought between this one and ToP but in the end this one does not actively make me stop watching it.
I do enjoy this arc, Champa, Hit, Kabba are okay characters... But it sort of feels very "safe". Nothing much happens, Monaka's joke wears down really fast and the only thing I really enjoy are Hit's time skills and Vegeta/Kabba dynamic (not a fan of Blue Kaio Ken really).
Also the whole show didn't manage yet to be free of the feel of "plastic animation" from early Super.
ToP - C-
This one is the arc in which Super (finally) finds it's good animation. And that is one thing going for it.
It also has pretournament arc, which is pretty sweet. UI and the ending are enjoyable too.
On the other hand parts of it drag like all hell (sometimes it gets so bad as in Z) and there's no guessing which episode is going to be frickin epic and which will be a bore to sit through.
The writing tight at the beginning - takes a major turn about the halfway point (I think maybe after the first UI transformation?)
I always dread this point.
I tried to watch ToP 5 times. 4 times I dropped always on this very moment.
For the fifth time I soldiered through but that's saying much.
Having your characters shout for 10 times per episode "love, love, love", or "justice, justice, justice" is NOT good writing.
Jiren backstory was very lazy even for Dragon Ball villains standard.
The throwbacks they made to Z only made me cringe, not feel anything.
And then there was that much of redundancy. Why give Vegeta a new form if we'll have Ultra Ego soon? Why do Legendary Duper Saiyan knock off if we have Broly in the next movie?
I also remember people speculating about the saga... Grand Priest being evil... Our heroes battling the gods... Something that would mean it's more than just a tournament.
Unfortunately it was just a tournament.
BoG and RoF Sagas - F-
I cannot treat those as anything other than a major waste of time, unfortunately. Not only these are stories that were already told better but in horrible pacing, bad animation and a very slow start for a shonen.
If the idea was to present some new ideas to the stories than they failed at this - not only nothing noteworthy is added but some stuff is changed for worse in my opinion. The only saving grace would be the Goku and Vegeta training episode but it's not enough to save both sagas.
When doing a rewatch of Super I always watch the movies and then go straight to Universe 6 ignoring those arcs....