I get angry when I'm having ISP problems, wait on the phone for 35 mins. to talk to a tech who informs me it's my computer -- all three of them? Vendors who don't have product in stock, but charge your VISA far in advance of delivery time. People who use their front lawn as a graveyard for old cars, or run a "midnight auto" from it. Neighbours who think "what's mine is theirs". Work at home scams. I could go on, but that'll do for now. Catharsis is good, very therapeutic.
What makes me angry the most? Stupid threads like this. Threads like this piss me off. It just clutters up the forum.