Well, aside from reading and writing, I enjoy fooling around with music, mainly electronic computer-based music. I find when my writing efforts become blocked (this happens often), that working on music is a good pastime: writing I find very stressful because I'm a perfectionist, but because I'm much more casual when it comes to music, I find working on it to be utterly free of stress/worry. A number of years ago I started up a netlabel named Mauve Zone Recordings, partly as a way of releasing a lot of my own music (usually under the name Sypha Nadon), but also music done by my friends, or re-releasing music recorded by my younger brothers back in the 90's, when they were in a group called The Cat Band.
I also enjoy playing video/computer games, spending time with cats, visiting antiquarian bookstores, going for walks, watching TV and occasionally movies with my younger brothers (we especially enjoy Friends, Batman: The Animated Series, Game of Thrones, The Three Stooges, Frasier, Family Matters, and various old video game cartoon shows from the early 90's, such as Captain N and the original Mario/Zelda ones).
Recently I've also gotten into weightlifting (of a sort). I've always been a very thin guy, so excess body fat (usually brought about by stress/anxiety) tends to go to my stomach. I'm no stranger to vanity, and I know that one day I'll just be a disintegrating pile of meat anyway, but in the meantime, I've been trying to build up the muscles in my upper arms in the attempt to circulate some of that excess weight there, which seems to be working (also, I think it is kind of cool to see actual biceps when I flex my arms now). Every other day I do 10-15 bicep curl reps, using ten pound fixed weight dumbbells. As inspiration to this endeavor I keep a Tom Daley poster hanging up in my bedroom, partly because I think he has a great physique and he seems to spend a lot of time keeping his body in shape, and partly because I have a major crush on him, ha ha.