Aggression is a double edged sword.. Pac wouldn't have been half the fighter he was without his "damn the torpedos" style...That's only thing that puts him in the same class with the greats.. no matter what happens.. he is going to be going for the ko at all times..
When Roy was prime, he'd take the aggressiveness out of anybody in under two rounds.. but the ones that maintained their aggression later on are the guys that had success.. Tarver for example.. ate a lot of shots in their first fight.. but he just kept bringing the pressure and careless aggression. Now I still think he lost.. but he showed how to get to Roy
Floyd had the same situation with Castillo.. the acceptance of damage taken in exchange for the opportunity to give some damage.. a little wrecklessness is the only way to compete with a superior fighter...
and Pacs wrecklessness got him to some places that nobody would have predicted would have been possible for him.. of course it cost him too.. but that's the game