What else do you do with your leisure to pass the time? Walk the dog? Knit? Run marathons? Construct grandfather clocks? Collect eggshells?
I do knit (I started last year), though I try to combine the two hobbies by knitting while listening to audio books and reading knitting books. I adore Ravelry and think it is a fantastic resource.
I'm also into BookCrossing, a book tracking site (here's my bookshelf). I do lots of BookCrossing-related stuff and attend meet-ups in Oakville, ON (monthly) and Rochester, NY (occasionally).
Russell and I play lots of board games, particularly eurogames. We're on Board Game Geek where you can see our game collection (the war games are all Russell's). We also cycle when the weather is good and participate in the Ride for Roswell every year.
I also volunteer for Youth for Understanding, the exchange organization through which I went to Germany when I was in high school. I support international students, do interviews of American students applying to the program and potential host families, and I just became certified to give specialized training to other volunteers.