GT had ending hat was sad and kind of turned the series again back to it's eastern legend roots...
Made me sad as a kid, but it doesn't sell for me nowadays, because it is basically the rehash of Z ending, but with Goku ascending to heavens and the story lives trough his descedant in the future.
It made more questions than answers...
In Z, I like how Goku flies with Uub with promises of next adventures and the shot of Dragon Balls in manga, as long as there are dragon balls, there is the advenure...
In GT, Goku probably died in fight with Li Shenron, but (a little headcannon) somebody he became Shenron's champion against the Evil Dragons? So his spirit lived, or he was still alive, but instead of going to the realm of SSJ God and challenging gods, he became mythical himself somehow. Dragon took him, everyone was sad, haven't spoke to each other for decades, Goku was finally aknowledged as hero next to Satan and here we are in future, with offsprings of Goku and Vegeta - probably fighting weak humanoid parrots and animal demons.
Well, for me Z's ending was better and even tough I can enjoy GT for designs, it's new atmosphere and the elements that I like about Dragon Ball, I hate how Pan is two things for the whole show without development - 1. annoying asshole, 2. damsel in distress.
We have waited almost two decades, for some whatever Saiyans from Uninverse 6 to finally see female Super Saiyan!
There we have Pan and her biggest trait is being mastering kamehameha like everyone at this point (even Trunks) and being annoying (Man, I like Yuko Minaguchi's Videl, but this is bad).
I also hate how the journey for the six balls was completely redundant and it made Piccolo kill himself, Goku staying as a kid, Super 17 saga killed Android 17 that was actually sympathetic guy and didn't make sense and only arc that actually had good premise (oh, sorry, Baby wasn't bad, just the idea that he made Dr. Myu, that made Baby, that made the machine mutants and there was this Guy with a whip, but in reality, the Whip is a guy and real mastermind! But there is one guy who is pervert and collects dolls, that is the mastermind BUTT! General Rildo is the mastermind above him, but actually all of this is Myu's doing, that was made by Baby BUT, Baby made him first and then Baby killed Myu while inside his... WTF!), so Evil Dragons was actually good arc with great idea, just populated with Goku and useless Pan, for the other guys to joing later and being cannon fodder for the Li Shenron, that had great design, which was actually a Dragon Quest knockoff
and Uub being weak and useless even tough being Kid Buu incarnate and merging with Majin Buu...
And this was the reason, why we haven't got the Z ending.