To turn the question around, I find guys who are jacked tend to be much more aggressive (no brainer). Throw in alcohol, and it gets worse. I have a guy at work that went on 750 sustenon, and some primo. He only gained 7 lbs in 4 months (Dan Duchaine style shitty genetics).He went from being an immature 23 years old goof, to an explosive, mouthy a-hole. Some guys can't handle their stuff.