People who don't plan ahead when driving, if you are going to turn onto a different street get in the correct lane with plenty of time. Don't try to make that last pass before your turn.
Driving under the speed limit.
Driving slow in the left lane.
The main reason I wouldn't get an iPhone is because I have had problems with AT&T in the past. Once Apply opens their phone to other carriers I think they will increase their market share.