I've become more militant about my beliefs, and have learned to look down upon those who don't adopt my novel lifestyle.
Commuting has certainly changed my personality. I never was obsessed with what other people thought of me, but now I couldn't possibly care less at all. What I do works for me, it's the best thing I've ever done for myself, and if someone thinks it's weird then more power to them. When I drove all the time, I was always in a hurry in everything I would do, and I was pretty angry most of the time. Now I'm much, much more relaxed and calm, and I have considerably more patience. Utilitarian cycling has made me care nothing about pop culture, electronic gadgets, trends of any kind, etc. I now read instead of watching television, and as others have mentioned I have much more money and my health is better. Basically being car free has done nothing but improve my life. No, it's not all rainbows and butterflies, but it's closer to it than the way I once lived.