I used to play soccer competitively until both of my knees gave out on me due to various injuries. I've also played hockey and basketball at a competitive level in the past, though I had to stop those too. Even though I don't play as much anymore, I'm still a big soccer fan and try to watch games whenever I can.
While I can't make any of it myself, I really appreciate good art work whether it be traditional with paints/oils/etc or cg, especially landscapes or large structures. The detail people have been able to put into some of these works is just mind-blowing to me (for example: http://www.deviantart.com/art/Northern-Conveyor-147491689). I did used to write a fair bit, mostly fantasy style fiction, but I haven't had the time to do so nearly as much since my coursework started speeding up a few years ago.
There's no way around the fact that I'm a nerd. I play video games (more specifically RPGs, RTSs and MOBAs), like sci-fi, and play music (keyboard and cello) for fun.