Dude, I don't mean this as a dig, but you might want to go see a doctor/therapist. There's no reason to walk around pissed off all the time & it will probably shorten your life (blood pressure, heart disease, pissed off gun-nuts shooting you in the parking lot, etc). Surely there are therapies & pharmacuticals that would be effective in mellowing you out & your insurance may cover it. Your quality of life could be alot better. I remember some other posts in here about taking paxil & other similar stuff while "on"---prob. in the archives.
Anyway, I agree with the other guys that "roid rage" is a myth. If you are mellow, you wont have any problem. I'm pretty laid back & when I'm "on" if I experience anything, its like a calm euphoria---I honestly feel more relaxed & mellow when "on", maybe its confidence, I dont know.
However, if you are already aggressive & have a short fuse, roids are not for you. Nobody has said anything to you about avoiding test., but in your case, it could be a problem as well.