I agree with almost everything said here. When I was living in San Francisco, though, my bike commute was only slightly longer than my bus commute (not because I am that fit, only because buses in San Francisco are terrible). SO MUCH less stressful! I did notice one thing, though: I wasn't reading as much or listening to podcasts as much anymore.

I live in NYC now and fortunately I'm a very short walk to work. I can't wait to buy a bike and start riding again, though I'll need to figure out how to fit one into my tiny apartment ...