As I was reading all these replies, I was wondering if anyone has any small children. You all seem to have all the time in the world for biking. Gosh, I have a hard time squeezing it in. But...... my response to why I bike.... because I want to keep up with my kids! They want to do SO much. Their eyes are wide and the world is still brand new to them (ages 6,8,9). I guess that just boils down to wanting to have FUN!!!