other stuff I do...
*Books: Well, I'm an English lit/writing teacher, but the passion for books was there long before the profession. I went to grad school to become a teacher instead of pursuing law school, and it was that same passion which made the decision an easy one. Unfortunately, my reading time ebbs and flows with my teaching schedule, so I'm rarely getting as much done as I did in my student days, but there is always something being read, and something else waiting. Currently reading The Undercover Economist by Tim Harford.
*Music: I'm not a musician, but the collection and studying of music has been prominent nearly as long as the book thing, and always is in the forefront. I feel very lucky to have grown up on 70's rock, to be there for first-wave stuff in punk, hip hop, hardcore, metal, and whatever else sounds exciting. Right now, it's mostly about stoner/doom/sludge stuff, some dating back to the 70's.
*Gym bouldering: I've been climbing on and off about 10 years, but the opening of a gym close to my school and home has led to weekly & biweekly sessions and some gradual development in my ability. It's still a supplement to riding, but I could see myself doing more if time was to permit. I've also done a fair amount of roped climbing over the years, but the gym has been it for the last two years or so. I love the purity, the physical and mental challenges it presents, in much the same way that I love cycling.
*Cars: Not nearly as big a deal as it once was. I began working on them long before I could drive them: First ride was 74 Vega into which my father and I swapped a Buick V6, working in our home garage when I was 16. I had a 5 liter Mustang in the 80's that I tweaked a fair bit, and then it was 15 years of VW, starting with a modest 2.0 8V Golf and moving through two 1.8Ts and a 24V VR6. I made a huge move earlier this year in jumping to a Mazdaspeed 3. If I wasn't so heavily into bikes, I'd be modding the hell out of this car. It still might get a little aftermarket love anyway.
* My wife: Many of you have cited the importance of family. This obviously is way beyond a "hobby" for all of us. My devotion to my wife is impossible to truly put into words, she's an angel sent from heaven to me.