Yeah, what they said. On a purely personal level, it's a question of time. Over distances of only a few miles, and in heavy traffic or where parking's a problem, bikes are actually faster than cars. If you're going 10 miles or more, and you can drive on a fairly open road, then a car will be much faster, easier, and more convenient. And then there's the environmental impact to think about. In my case, not having a car hasn't really changed my lifestyle at all, except for saving me thousands of dollars every year and freeing me from the vexation of being stuck in traffic. Overall, unless you live out on a farm somewhere, I highly recommend life on a bike. (I mean bicycle here, the kind you have to pedal...)