KK or QQ with overcard on flop

Even if he had the A 9 off, that would still have your Qs or Ks beat. Perhaps you did not read all of the question, JMT.

You have to know what hands he will re-raise with as well. Say the flop is A-8-3 rainbow and you hold KK or QQ, is he/she the type of player to raise with a PP of nines and up?

I would say if you don't know your opponents play it a lot more tightly until you do know them. Once you know them, then you may be able to play it further/more aggressive if they are loose players.

[cdjackson]

Bet it up!

If you know your opponents this will help a great deal. If you bet then they will think you have it. You came out firing before the flop and now with the A out there you are again betting it up. Chances are they will fold unless they have an A. But you won't be able to tell that if you don't bet.

Yeah, but if you bet knowing that one of them probably has the ace, then then most decent players would call with a pair of As unless it was an all in bet with a big stack.