I have no problem with bikes as long as they aren't on a road that has a parallel bike path right next to it. Then I get annoyed.
Also, the ones that ride against traffic are idiots, as are the ones that think because they're on a bike they don't have to obey traffic rules. The stop signs apply to them too, and it wouldn't hurt them, considering they're 100 pounds up against 2 tons of car, to signal what they were going to do from time to time