I was going to say snooty, but you just had to show off din’t you? 
Cruelty
Perky
Annoying. (Really, don’t all other personality traits come down to that? Why does someone being hateful, arrogant, spiteful, etc. bother you? You find it annoying. It’s the catch all. My take, anyway.)
Disingenuousness
Oh yeah, and pretentiousness.
Insane
Unaware.
intolerant
WillyK insane is not always a bad thing, sheer idiocy is.
Kitty
Unreliable
Impunctual
lying
IGNORANCE 
Do hyphenated words count?
Not-me
Dead
These people are the worst! What could be more annoying than a party full of dead people? Ya ever try and get one to give you a ride anywhere? Ever lend money to a dead person? Ever see it again? Didn’t think so. It wouldn’t be so bad if they would just get up off of the couch and look for a job. The worst part is their eating habits. Yuck… brains this, brains that. Makes me sick.
Curiosity.
Y’know, it killed the cat, right?
I guess it depends on whether or not you like cats.
Dishonesty
Dishonest people more often than not have all the personality traits listed thus far.
Ex-husband
Yep.