h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

I wouldn't recommend this, because it is not psychologically healthy, but I was living in a bad situation for a long time as a teenager, and was being verbally abused constantly without being able to respond for fear of punishment. So for a while I would get blindingly angry, but that only made me talk back and got me into more trouble.
Over time I learned to convert the anger in my head into sadness--I only had to close my eyes and instead of wanting to hurt someone, I wanted to cry. Sadness was easier to control than anger, and kept me out of trouble. Kept me crying myself to sleep a lot too, but at the time it seemed like the best way to go.
Doing that for so many years brought me to the point where now I no longer really have the capability to get angry. I am utterly serious, I haven't felt anger in about two years. Every time I experience something that would have made me angry, I just get a little sad, or don' t react at all. It's made me very even-tempered, but also a bit melancholy.
-Rivaine

Can appreciate where you're coming from,Rivaine.I had similar crap like that from the "Thing" that calls itself my mum.Has resulted in me being virtually unable to trust people,let alone get close to them.As for when feelings of anger rear their ugly head,I just put on some loud music (Zeppelin/Sabbath/Ozzy/Cathedral)and listen through headphones so as not to disturb the people in the other flats where I live.
On the plus side,though,while I am somewhat introverted because of my experiences,I am able to see other people's points of view without losing my temper,even though what they may have to say clashes with my thoughts and beliefs.

Aye, it helps not to get angry at people, especially when so many people deserve it so richly. The only times I get angry is when I get mad at myself, which actually is worse. You can't yell at yourself. Or, well, you can, but it doesn't do any good, 'cause one side of the mind is yelling and the other side's whimpering in a corner, and nothing gets done. That's my time for loud music on headphones. Bright Eyes is my depressing band of choice when I want to whang my head into submission.
-Rivaine