When I was younger, playing music was my hobby. I played Clarinet for 6 years, reached A music, played for a while and stopped. During that time I played guitar and piano. I was sooo close to picking up the flute because the girls in the section could never do it right. lol, That upset me.
Starcraft has always been a hobby of mine since I first picked up the game in 1998. (I am not a "gamer", I exclusively play Sc, save for a few other titles from time to time)
Computers aren't so much a hobby but I have built computers. I have enough knowledge and resources to builds decent towers. They are cheaper and modding them can be a lot of fun.
Skating. I have the worst ankles ever. Didn't last long at all.
Sports, I never got big into it. I've played base ball, soccer, tennis, and got really good at table tennis (ping pong). Oh, I got into swimming. I was a good swimmer, my sister was better and actually got to State level. My best was breast stroke, and my knees aren't bad but its weird. They can pop or something when preforming that stroke. The brace just didn't do it for me. So that ended.
I've done photography, can't say I'm the best at it. I do enjoy taking pictures and cleaning them up. Or not touching them at all. I use Paintdotnet as my photo editor. Its not as powerful as Photoshop, but if you spend some time you can get the same effects. You just have to do things a little differently.
I also enjoying shooting. I own several guns and I enjoy taking them to the range. I don't actually hunt, I just range. I'm not against hunting, I just haven't done it. Nor do I know someone who would go out hunting. Serving in military, (infantry) I'm not new to weapon systems. But, there is always so much to learn. I recently purchased a Yugo SkS, its relatively in good condition and I'm cleaning it up now. Its coming along great.
I also do a lot of cycling. I put a lot of hours and replacement tires on my bike this past summer. I really got to know my town well, and last Christmas I was given a bike attachment for my car and I'll be able to go out further and to different parks next summer!