My parents make me very angry. Any direct family member pisses me the fuck off.
I hate people who grief competitive games. I hate people who take casual games seriously. I hate people with sheep-tastes. This makes me angry.
PS3 vs 360 makes me really angry. Both have merits and downsides. Who cares.
I hate people who call themselves artists when they're sub-par, uneducated, and unqualified. Worst of all, no talent.