Not really. Like... there are plenty of things that I like that don't have fandoms (or have fandoms that are totally orthogonal to what I'm interested in) and I'm fine with that. But I would be interested in fandoms for those things if they existed, or were more in tune with what I cared about.

I think there's a pretty direct relationship between how much I like a thing & how interested I am in fanstuff, honestly. And the specific fanstuff can vary from fandom to fandom - sometimes I want meta, sometimes I want fic - but if I like a thing, I'm usually going to be somewhat interested in more.