I sold my truck and went car-free in November. I had been living extremely car-light for a year before that. I would drive when I had a physical issue bothering me. Now I either tough it out, or take a bus or cab. I still enjoy the occasional drive away from crazy traffic. I hate rush hour in the car, but tolerate it on the bike.
On the flip side, sometimes when I'm depressed and have errands to run, I say "screw it" and stay home. Getting out the door on a bike seems harder.