My favorite hobby has been wrenching on my truck when I can. Since I work with software/computers all day it's a nice change of pace.
Now that football season is here watching the Browns with my daughters, wife, dad, brother and buddies ranks up there as my favorite (yeah I'm a good Ohioian and watch the Buckeyes too). After that I play some computer games and every now and then I break out my RC cars and trucks.