When I started commuting about four months ago, it wasn't meant to be a complete lifestyle change. It was meant to save money on gas and parking and incorporate some exercise into the daily routine (I was getting a bit pudgy). Well I will eventually save money (I've wound up spending a good bit on the bike and gear), and I'm in much better shape (25 pounds shed over a few months). I didn't expect that I would love traveling to and from work as much as I do (prior I was at best indifferent, at worst frustrated by traffic). I've wound up completely altering my wardrobe and appearance... some changes related directly to cycling and others unrelated, but it really has been a tremendous lifestyle change. And I expect it will continue for a very long time.