But for a standard TAG player 80% is a typical number, and AA is also by far the biggest winning hand. Maybe a bit less, if you constantly play it passively, and therefore allow other players to realise more of their equity. On a more serious note if you collect your hands in a tracker, you will see, that over a reasonable sample like 50.000 to 100.000 hands, AA is winning around 80% of the time.