Fun, fun, fun!
I started bicycling again as an adult after reading through Ken Kifer's website on touring, and also because I wanted exercise. I stayed with cycling because it's the only exercise that doesn't feel like exercise to me. I don't dread doing a "workout" where I get all sweaty, exhausted, and feeling like I've just been beaten to a bloody pulp. I'd be commuting to work now if I found a good route to get there and had good lights/night riding equipment (let's just say that my shift gets out after the sun goes down, even during the summer). Oh yeah, and I don't currently have a bike, but I want to get a new one so badly.