Or at least irritates you and pisses you off. I'll keep this to the real world, but throw in whatever you want.
What makes me angry is seeing a friend in a relationship and they're in the honeymoon phase for months, constantly flaunting their relationship and waving it in your face, and never seeing their friends to see their boyfriend/girlfriend like they hardly see them or they've just met. YOU JUST SAW THEM TWO DAYS AGO!
Also, people who are just plain rude and [censored]y. I always try to think in somebody else's mindset before I judge behaviour. I like to imagine how, say, if something happened, how would they-and I- react. But when people are just [censored]y and rude for the hack of it... it boggles me. There's a few people I know like that, and I just feel like I'm stepping way way to the left just to try and comprehend why they act like that. For me, life is easier and simpler if you get along with everyone and make people happy.
Last but not least, when you stub your toe on that bastard coffee table and you get that mad rush of pure rage, but nothing to unleash it on. You can't blame the table because it's (obviously) inanimate, and I'm the only person to blame. But NO! In my blooddrunk frenzy, I'm totally right and something is in the wrong!