Here's a relatively comprehensive list.
Teenage girls. Just in general. They think they're entitled to all the attention in the world due to how parents seem to be raising their girls now. I suppose those same teenage girls who just grew older count as well.
Weeaboos. That is to say people who call themselves otakus unironically. I suppose there's a lot less of these people after the early aught anime boom, but they're still out there.
People who didn't have to fight for where they are. I grew up on the poorer end of the spectrum, as far as Americans are concerned. I've had to live in homeless shelters multiple times when I was growing up, and was kicked out just prior to my 18th birthday, whilst I was still in high school. So when I see these privileged fucks go on about how great college is, when I know that it came at their mommy and daddy's tab, I get bitter. I'm doing the GI bill route, and the military is arguably the best choice I've made, but it was damned hard.
Anyone who thinks they're smarter than me, or anyone who believes they can control me when they damned sure can't.
People who see punishment as a painful thing that must be avoided instead of a possible outcome for an action. It's the question of avoiding a certain consequence instead of accepting it.
Dishonest people. GOOD GOD I hate liars. Badly. I go out of my way to the truth, I expect everyone else to live at my standard. In reality, that's forcing my entire moral belief system on others, but I'm not aggressive about it, so in my view it's okay. But lying isn't.
People who can't let previous mistakes of mine go, and consistently bring it up.
People who have to try to belittle me in order to feel better about themselves.
People who think love is forever, and still has totally romantic notions about what a relationship should be, instead of accounting for practicalities and economics. Bottom line, if your boy-toy is kind of an inconsiderate asshole, then you shouldn't have him in your life. You'll have to punish him in order for him to care about how you feel, and he'll resent it. Just let him go.
People who refuse to grow.
People who waste my time.
People who touch ANYTHING of mine without notifying me or having a very good reason.
Spies in TF2. They just make me mad, because I'm a Heavy player, and I hate not being able to engage them on equal terms a lot of the time.
Ninja pro users in MW2. I use SitRep Pro with a 5.1 headset, so my game is 60% awareness of environment. If I can't hear people, I can't know where they are most of the time, and I get surprised and killed in very short order.
[Edit]
Round 2!
Fanboys, but even more so, fangirls.
Most women who are open about their sexuality. Why? Because they invariably hate my ass. I use sexual thoughts as weapons of terror, things to intimidate others. Homosexuality, bestiality, whatever. I will say I do it or like it just to see others squirm, for my own sheer pleasure. And none of that works on them. I can't terrify them by being the big bad pervert. Also, I'm sincerely jealous of them. How dare they be able to get their pick of the boys, when I don't get any girl I may so please. I'm not happy with my sex life, or love life in general, so I want NO ONE to be.
[Edit]
Round 3.
Oh, and alcoholics. I mean, addicts in general make me angry, but those who have their actions negatively affect those that care about them make me angry. No, alcoholics have a special place in my heart because I keep knowing so fucking many, and they treat me like I'm the asshole when I don't want them in my life any more than I have to.
[Edit]
Round 4.
Furries. Here's why: I have to live every day in my own skin, with my own identity. I live with who and what I am. They should have to as well. There shouldn't be some alternative form for them, there should be no safe haven or refuge. If you hate yourself so badly that you have to become something else, wouldn't it be smarter to punish yourself by just being you? After all, you hate yourself, right?
