I can't remember the last time I was angry, let alone angry enough to display anything. The closest I come is frustration, annoyance, or disappointment. People at my work have commented on my lack of anger, and seem to be of the opinion that if and when I actually do get angry that it will be a sight to behold. I have a theory it's because I was criticized so much growing up, that instead of getting angry at something, I've been trained to instead think that I did something wrong, and then I just end up feeling guilty, not angry.
Also, conflict in general gets me upset and sends me into a shutdown.
Slight tangent: I don't really swear either, for different reasons; I feel that if you overuse your swearwords they lose their impact, and then what words do you use when you want to get your point across? There's a guy at work that feels like every other word he says is a swear word, and no one bats an eye, but over six months ago some coworkers thought it sounded like I had said the f-word (I hadn't), and they still talk about it today 