Probably the one thing that I spend the most time on outside of work is karate. My son and I started taking Tae Kwon Do about 6 years ago (it was his idea), and almost 3 years ago we switch style to Tang Soo Do (it's a similar style) and recently earned our first degree black belts. I've been doing more instructing/ teaching than actually working out of late, but it's a good way to exercise and keep the gut from getting out of control.
I read a LOT, typically at least 1 or 2 books a week, often as many as 3 or 4. I also tend to read a lot at work, though I'm not supposed to read while operating the locomotive, but what they don't catch me doing won't hurt me
I also enjoy video games (got a PS3 and a Wii), mostly the racing genre, just getting back into GT5.
I also enjoy tinkering with the truck or one of the other cars. It seems that I'm also looking for more lights to add to my PT Cruiser (its' the only one that the wife will let me go nuts on LOL)