Uhh, this feels like church confession, so here goes:
I read comics, specifically snappy graphic novels like Watchmen or Heavy Liquid. My best friend also draws for Marvel, so I'll read whatever he's working on or is into. Ninja/samurai comics are also a fave (this series called Kamui that came out about 20 years ago is awesome!).
I'm a lifelong gamer from back in the Commodore 64 days, but now I'm into the Xbox 360 (Pro Evo Soccer rules!). I'm also the de facto PC technician for my family and friends...
I'm big-time into world history, politics, and economics. I read a ton on this stuff, so I've got to be careful not to chase people away sometimes
I read literary classics - Dickens, Tolstoy, Dostoevsky, Gogol, Hemingway, etc.
Because I've used them intensely on the job for 10 years now, I'm a fucking Powerpoint/Excel/Word master. Everyone comes to me to find out how to use the tiniest feature, which is pretty geeky. Same goes for networking and communications, the industry I'm in...
I'm a massive sports geek. I've toned down lately, but I used to be able to rhyme off every stat for every player in practically every sport. I love boxing too, which is kind of considered geeky now because it's so marginalized...