Well, there are a number of things that tick me off, considering my bad temper, but there are some that stand above everything else:
- When people intentionally take and/or mess with my stuff, without my permission. Even more so if the intention is to annoy me.
- When people frame me, as in, they say that i did something that i didn't do in reality. Even if people were kidding, i would take it as a grave offense.
- Being interrupted repeatedly while speaking. Luckily not an issue over the internet.
- When people prevent me from doing whatever I'm doing or what I'm about to do (scratching my head, laying my arm across my stomach or whatever).
- Constantly losing at the same point in a video game.
- Video games that crash repeatedly and without any reason. (I'm looking at you, Fallout 3!)
... Can't be good for my mental health.