I grew up with Crash Bandicoot and Spyro first, years before I got Mario or Sonic. I latched onto Spyro but it took me until the N. Sane Trilogy to really like Crash.
I kind of had a similar thing happen with me when it came to Crash and Spyro. I always liked both but as a kid I vastly preferred Spyro and never got what everyone seemed to see in Crash over Spyro and why it was the more popular game around school. Nowadays I think the Crash games are fantastic. As for Spyro? i hate to admit this but the most recent time i played through year of the dragon i actually thought it was pretty bad
Funnily enough, same thing happened with Ratchet & Clank and Jak & Daxter. Loved Ratchet much more as a teen, now much prefer Jak & Daxter I still really like Ratchet though, even if now I find the humour and cutscenes far more obnoxious now than I used to (god, Courtney Gears). Jak on the other hand, I was one of those Precursor Legacy faithfuls back when I first played the series that hated the darker turn Jak II took, but after replaying it I actually think it's far more hilarious and tongue in cheek than I gave it credit for back then. I seem to just find Insomniac's writing, characters and humour more and more obnoxious as time passes disappointingly. Sunset Overdrive is just straight up unbearable for me.