I don't get peeved when people tell me how I'm being all "green," but I do make a habit of pointing out that green has nothing to do with it - my poor old 1992 car has 164,000 miles on it, and I figure every mile I put on the bike isn't going on the car. I'm too cheap/broke to buy another car, so I wanna make the one I have now last as long as possible. And if it has a finite amount of miles on it, then riding my bike at every opportunity is lengthening the amount of time until I hit that finite amount of miles.
So it's now become an odd challenge - some things I can't do by bike like I'd like to (doctor's appointments in town 40 miles away) and some things I haven't quite figured out how to do yet (like go to the freakin' laundromat), but I'm still hoping one day to be able to go without the car for, say, a whole month and not just a week like now.