What are your reasons for eschewing cars?
Most people tend to assume that I don't own a car because I want to "save the environment". It follows that I should look favorably upon low-emissions cars like hybrids. It also follows that I am being somewhat inconsistent, naive, or hypocritical in other habits that aren't terribly earth-friendly, such as enjoying long showers. But saving the natural environment isn't my motivation, not the core anyway. And I'm unimpressed by hybrids and cold showers.
Just as a vegetarian who simply doesn't like the taste of meat might conveniently claim that ethical considerations, health, conservation, and thrift are motivators - and those are good reasons - I find that I often cite personally extraneous reasons for biking everywhere I can.
My real reasons are that I love bicycling, and tend to view trips by other means as a missed opportunity. Even when it's dark and rainy. It's like flying, like a bird. I'm not convinced of reincarnation, but if it's so, I think I have a lot of bird history. Also, I have strong sedentary tendencies by temperament, and benefit by some degree of compulsion to keep physically active and emotionally stable. I'm an endorphin addict, and car ownership combined with laziness would conspire to keep me from my fix unless half my trips were to the gym, and that would be just too ironic. I've never had any tolerance for "exercise" or "training". It needs to be built in to my routine.
All by themselves, those reasons would be enough to support my habit, even if cars were free and ran on white magic, and if bicycles ran on puppy blood.
Peoples' behavior influences their thought as much as the other way around. Once you're no longer committed to a certain behavior, you can see it for what it is. Not driving became a political/ethical/environmental issue for me only after ten years of adulthood not doing it. I'm slow. I am increasingly depressed and outraged at the effect of automobile use on built environments and social health: sprawl, noise, the whole idea that most "public" space (roadways) are effectively off limits to children and other people not piloting private motorcages at deadly speed, the culture of fear, road rage, the homogenization and dis-enchantment of places and distances, the cartoonization of architecture and signage to what can be scanned at 35mph+. And national economic security considering where most of our oil comes from, how most of our stores are filled, and how far we are from seriously finding alternatives... it's enough to cry.
Recent favorite reading: http://tinyurl.com/4r8xv ; http://www.rollingstone.com/news/story/_/id/7203633