They piss me off.

SBC/AT&T - unparalleled arrogance and incompetence (change your name; fine... I still know who you are and where you sleep at night)
Time Warner Cable/RoadRunner - multifaceted stupidity of obscene proportions
Verizon Wireless - fucking up MY phone (a few blueteeth short of a protocol). Contracts, contracts and more bullshit contracts.
George W Bush - bringing down the average american IQ
Dick Cheney - opting not to go by "Richard"
USPS - pathetic inability to track anything, general laziness
OfficeMax - deceptive pricing, low quality store brand products