I have never raced nor had any particular interest in competition, but I wouldn't rule out racing in the future. It would all depend on finding the right kind of races to participate in. I wasn't into aggresive/contact sports in highschool. A lot of that was to do with my general klutziness and the fact that I was really busy with all the music I was involved in, but it was also because I enjoy sports for the social factor and the getting outdoors factor rather than the competition. If I found a race (or series of races) more about getting out there, giving it a go, having fun, meeting people and learning more about the sport than riding faster than everyone else I'd certainly consider entering it. There seem to be lots of triathlons like that, but not as much for other sports. I can imagine getting hooked if I did well, and it would provide motivation to get out there and ride when I couldn't entirely be bothered.