Personally, I hate the people who think that their lives suck.
Like one of my friends, who somehow, despite being one of the most immature and stupidest persons at our school, still manages to get about every other girl to want to bone him.
Yet he still manages to think that it really sucks to be him.
This kid got caught selling weed and got three weeks of grounding. And then he tries to make me feel sorry for him.
I got a weeks worth of grounding for my dog peeing on the floor.
Edit: Also, (I am not sure if this is a personality trait) I despise people who state the obvious or most popular choice of the time just to get attention and to be agreed(?) with.
For instance; Youtube "Foo Fighters is the best band in the world, thumbs up this comment if you agree!" (on a Foo Fighters music video), And this stupid facebook group that I am now seeing "Just because you are Muslim Does NOT mean you are a terrorist... like this if you agree". No shit being Muslim doesnt make you a terrorists, is this really something you need to agree on?