Annoying people!
Noobs.
People with attitudes.
Studying.
People who ask about selling soulbound rings. x.x
Grammar Nazis.
People with poor grammar.
Cats with loud meows.
Dogs with loud barks.
Cars with loud exhausts.
Teachers who think they know everything.
Teachers who don't know everything.
Teacher strike days on exam days.
Teachers.
Taxes.
Wars.
Green coloured vegetables.
Blue waffles. Yeck!
Indians who talk really loudly at the most inappropriate times.
Public Transport.
My local council.
People who are mean.
People who pick out things that are wrong with you, and then are compelled to tell you such things.
Things that I can't remember.
Annoying songs that repeat the same line in a droning tone.