Good thread! Here are a few of mine:
-Drivers who don't signal.
-People who think Honda civics are sports cars.
-People who need a loud car stereo to get noticed.
-Ignorant people who talk about things they no nothing about. Example: "That 4 foot ball python is dangerous! It could have eaten my cat!" Damn, get a clue lady!
-People who drive in the left lane. THAT IS THE PASSING LANE!
I'd better stop before I blow a gasket here!