Here are a few of my more significant obsessions at present:
-Art (I do a lot of cartooning)
-Researching LGBTQ issues in K-12 education (I have an ongoing project, which is more my own than for school, though it finds its way into my homework often)
-Young adult literature (I can justify it--I want to be an English teacher... okay, so maybe it's a guilty pleasure)
-Historical fiction novels
-Birds (especially corvids-- crows and m->-bleeped-<-ies and suchlike)
-Studying, celebrating, drawing and writing about, being a part of, living, eating, and breathing human diversity!
...those are the ones that stand out in my mind, currently. Though there are more that fluctuate in and out.
Currently, I'm kind of in school-mode, so I have extraordinarily geeky obsessions at the moment. I mean... I'm always extraordinarily geeky. But I'm even more so than usual right now? (As soon as college slows down a little, which it's already starting to now, I'll probably lapse into Pokemon-obsession-mode, which I've been holding off for the sake of completing my homework. Which I guess is... also geeky, but a different kind of geeky? x3)