Joinin' in on this. Fandoms I'm in:
-Undertale
-FNAF (regretfully)
-Furries (kinda)
-Youtubers (for a few certain ones, mostly any of the 'clickbait commentary' Youtubers)
-Steven Universe
-Gorillaz
-Eddsworld (not as much now though)
-The Lion King (not as much now either, but i still draw and roleplay once in awhile)
-Also I like to watch the Pokemon fandom from afar
Yeah, I'm pretty uncool.