Looking for a fandom that doesn’t suck

I think if I encounter one more video or Tweet of someone explaining a complicated “theory” involving either the Marvel Cinematic Universe or Star Wars, I’m going to curb-stomp my phone. Visual media in general is dead to me outside of video games; if it’s not a cooking show I can’t motivate myself to watch it any longer, and The Book of Boba Fett is terrible. I thought for an hour or so that we might be watching Eternals tonight now that it’s streaming and I can watch it without paying extra for it, but my wife has decided she’s healthy enough to make an appearance at work tomorrow (I have the day off, of course) so she doesn’t want to stay up for it.

I need a new fandom I can dig my teeth into, something that isn’t personally exhausting and whose fans aren’t spectacularly toxic.

What’s good out there? What should I be paying attention to?