Baz m8 I suppose it depends on what you're taking. The last course I done was Decca / Dbol and I didnt have any 'anger issues' shall we say. I dont feel it affected my usual way of thinking or anything.
I got through the course without any problems at all, still managed to function as normal. although it was 8 weeks of only moderate doseges perhaps that had something to do with it.
yes you feel both of them , also I have heard some or all can be a stimulant for the nervous system, decreasing reaction times, making you more aware and energetic, but I am not sure.
essentially baz,steriods affect you like other drugs do.
if your jerk to begin with,expect to be more of a jerk,if your nice just remember you'll be happier because your making gains
good luck in what ever you decide