My husband still has his Lexus SUV. Of course, he bought a Miyata to compensate for the crappy gas mileage. The Miyata gets 30 mpg, so he uses it most of the year, but it gets parked in the winter, when it's snowy or icy. We still use the SUV for hauling around 4 bikes, a canoe, 4 people, and luggage quite a few times during the year. Also, we use it for hauling landscaping and home repair stuff. Around here, it's not so much that you need a truck, but you need a car with 4 wheel drive or AWD. I just happen to have a smaller sedan with AWD. Now I know some people get a long perfectly fine without all wheel drive, but personally, I won't drive in the winter without it. When my driveway, which is a 15% grade, is covered with snow with 2 inches of ice below it, I need all the help I can get, especially the cool "descending" assist that guides you down a steep and slippery hill without having to put your foot on the gas.
Other than the Lexus, we are pretty green around our house. We recycle, bring our own bags to the grocery store, and have had all the windows replaced in our house to cut fuel usage (it really worked). I have cut my driving tremendously, not so much because I am commuting, although I do do some errands by bike, but because I have really stopped going places far away for shopping. Everything I do is within a 7-8 mile radius. I take the train to my classes, so I only drive 8 miles round trip on those days. But, even when I was driving to work, I still drove way less than most of my peers. My car is 5.5 years old and has 40,000 miles on it.