Cars just come with so much baggage. The insurance, maintenance, purchase price, risk of collision, etc.

How frequently do you "share" the road with cars? How many of your neighbors are car-less?

What do you mean "share" the road with cars? I walk almost everywhere. I have a Zipcar account that I use less than once a month and a bus pass that I use even less frequently. It is hard to say how many of my neighbors are car-less, most people seem to own cars, but not out of necessity — it is a pretty rich area.