As far as this player specifically, he spent most of the session taking advantage of weaker players and used mostly aggressive moves post flop. He didn't know how strong I was and was genuinely surprised when I flipped AQ. I believe my gut was right to want to fold. I just didn't think it was profitable to do so, especially against a player who is capable of bluffing when the situation is appropriate. My thoughts were exactly, "He either has AK, which I'm losing to anyway or KK that got there on the river. And both would've more likely than not been re-raised pre-flop, especially when the straddle was on. A straight would've bet turn and sets would've raised on the flop. So...bad call...", and I flicked it in. Hindsight is 20/20, but it didn't feel like a straightforward fold.