[AllTheCheese]

0.8 is reasonably high aggro for a person who plays 54% of pots. I think someone made a good post on this recently, idk what topic it was, but I remember the gist of it. That aggro stat is a ratio between the number of times you took an aggressive action (bet/raise) and the number of times you took a passive action (call). Given how much he limps preflop, and how comparatively rarely he plays hands from the lead (i.e. c-bets, double barrels, etc) his aggro is actually pretty standard. Also, think about the type of hands a 54%er hits as well. They're usually not monster hands or even monster draws. They're usually medium-strength call down hands.

Btw, in my opinion, this river bet is usually a blocker by an underpair to the King. I'm very unsurprised if Villain flips 66 or a pair of 4s here.