@Chris: Some of your facts are from a marketing study, not a scientific one, that was never peer reviewed and has been refuted by the scientific community. Please look up the paper, “Hummer versus Prius: ‘Dust to Dust’ Report Misleads the Media and Public with Bad Science”. Producing any car creates waste. Prius included, but it doesn’t make so much to offset the benefits.
I know a few hybrid owners from online, and most of them were motivated by environmental concerns. They liked lower emissions, better gas mileage, and the encouragement their purchase was giving companies to develop “greener” technology. I haven’t noticed an across the board difference in any of them.
For that matter, some of them just like the styling, or the ride. Others were swayed by the uniqueness, or the fact that celebrities were driving them, etc. People buy cars for all kinds of reasons, so while I think our consumer choices do reflect parts of our personality, I don’t think we can safely assume which parts. 
