I have very hazy memory cause reasons, so it's hard to recall the specifics. I'll just map it out to the best of my ability:
- -I remember watching when I was as young as 5 or 6 (in 2005 maybe?). I had older step-brothers and their friends who were into it, so I had some kind of awareness of the fandom at large. I was also into the video games, and I did check out Z online for quite a while (This was probably around 2007-2008).
After that, there was a huge lapse in interest, since I was a very fickle child. (Contender: 2-4 year gap)
-I remember Dragon Ball Evolution advertisements, but never had any interest. Honestly, I haven't seen the whole movie even to this day. In 2010 or 2011, I watched Kai for a little while. My memories are especially hazy here, I can't even remember my level of interest, but it was enough that I distinctly remember watching it. Either way, it was certainly gone by late 2012-2013, since the Battle of Gods craze totally flew by me.
2011-2015 (Contender: 3-4 year gap)
-2015: I get bored, then remember Dragon Ball exists, decided that I wanted to watch the whole show. Once I'm done, I realize that there are 2 more movies than I remembered, and then I learned that Dragon Ball Super was a thing that existed (It was only about 4 episodes in at the time, but I didn't start watching until the RoF Arc was almost over). I've been an active fan since then.
So I've actually had two times where I totally lacked interest. I'd venture to say that the second gap was probably the least I've ever cared about the show. It never even crossed my mind to the best of my memory.
2011/2012 through 2015 was my Picco-low. That's my official answer.