From The Sun on the VanCity car-share report:

Younger car-share members are least likely to say they enjoy not owning a car.

“They are also the most likely to say they would sacrifice things such as chocolate and ice cream, an annual vacation and their sense of smell for 12 months in exchange for the free use of a private car for a year,” says Changing Gears.

The report also found that: Psychological benefits attributed  to car-sharing include freedom and peace of mind.