[groby_b]

Point 1 & 2 still apply, to a lesser extent, except I'd probably switch the order - being able to quit whenever you want is somewhat important. (And, always, point 4 :)

I'd also amend point 1 with "I don't like breathing in car exhaust". If you're in a big city "just do stuff outside" is not really as fun as it sounds.

[0xffff2]

Back when I was cycling regularly, I considered the fact that I couldn't quite when I wanted a major feature. Even considering the risk of blown tires, the ability to plan routes in advance that I knew I could do even though I would want to quit half way through was a major component of my ability to push my limits.