I've been a cyclist for 5 years. Can't say I had the purest of reasons for getting into it. Quite simply cycling (specifically mountain biking) was a replacement for the horses that I could no longer afford while in college.

I now road bike as well and have 4 bikes. I will say they do eat less and their "vet bills" aren't quite as expensive as the horse's. Still more than I bargained for when I traded one set of saddles for the other!