You know, right now I'm a bigger fan of talking about Sonic here that I am of anything else regarding Sonic. While not the same case as yours, I felt something like this the other day after watching the second movie: while watching it was a storm of feelings, the expected ones (opinions on each scene or reference, enjoying the appeal of the characters, etc.) but it also made my younger self clash with the present one, to the point I was really sad when exiting the theatre because I felt the film arrived too late and also that I kind of had lost a part of me that I needed to enjoy that film the way I was supposed to. "That's the past, I moved on" or something like that. But I'm still finding a good time around here even when talking about childish things, because, lost or not, the people around also had that kind of feelings at some point (their fandom, not my experience with the movie), wether they still keep them or not. I can still relate to you people even if I'm one of the lesser fans around now.