I've used solely cars for transportation since I first got my license. I can't imagine life without a car. Commuting, shopping, or long distance errands would be so much more time consuming, and nightlife would be kinda silly (who wants to roll up to a party or club 30 miles away sweating and dressed all wrong?).
Not to mention I love to drive. I
autocross my 1999 Miata regularly and am a member of the local BMW car club.
That said, since I've rediscovered biking, it's a new favorite hobby of mine. I rely on my bike more to commute (I take the car if I have a meeting or if the weather's bad). I take the bike to the local store for small things that don't require a car. But I still couldn't (and wouldn't want to) be without a fun car.