It really hasn't changed much for me, and it really won't until I'm out on my own. Luckily my car is payed for so I don't have to worry about car payments, and I get 28MPG so that really helps also. I have cut down a little bit on driving, but I'm not going to sit at my house and be bored all day. I plan on going to the beach still this summer and driving around with my friends.
For my parents though, it has changed. They have both cut down on driving a whole lot, since they both own trucks (well my mom technically has an SUV). They aren't going to trade in since my dad is a contractor and needs his truck, and my mom needs her Yukon for towing the boat and carrying around my brothers and myself. And no, you can't do all that with plenty of room in a crossover SUV or minivan.