What exactly does "Aggressive" refer to in the Gameplan options labeled as "Attitude"? Normally I think of Aggressive as either going for it a lot of 4th down or passing a lot. I'm fairly sure in this case, it's neither.
Can you clear this up for me?

Is this not clear as to what I mean? Aggressive can mean a lot of different things...

It affects things like going for it on 4th down, blitzing, downfield passing, etc.