Smart phones are expensive. More-so if you buy them off contract and unlocked, but even subsidized with a new agreement the high-end phones are going to cost you about three-fiddy after taxes and that's a whole lot of money. When you spend that much money, you want to try to take very good care of something lest you break it, and for many of us that means a case of some sort. On the other side, it's awful nice to use a hot new Android phone without a case. The Galaxy S II or the Bionic are super thin and beg to be felt in the hand. It's a difficult decision.
I use a case sometimes. I have one that I will slap on a phone if I'm headed outdoors doing something that sounds like it would tear up a phone, but most of the time I just slip my phone into my pocket and roll the dice. So far, so good.
What about you folks? Let us know in the poll.