-People who eat with their mouths open, smack their lips, and suck their teeth.
-People who fart when your eating.
-People who do not pay attention to other vehicles when they drive.
-People that think its cool to drive like an idiot.
-People who ignore the signature feature and sign every individual post they make.
-People who truly believe they are indepedant because they dress weird while ignoring the fact that millions look the same way.
-Reality TV.
-Gimmick haircuts.
-Attention whores.
-The IRS.
-Government employees in general.
-Windows ME
-Windows NT

Only the first four make me angry, the rest are more of an annoyance.