I think you both erred. If he was so tight, I'da put him on a pair, in which case I'd want to see a flop before I broke myself. Better to go out with top pair than an underdog preflop.

I think he made a mistake calling the all-in (depending on how much it was) after all that aggression. He had to know that the 66 was at best 6:5 favorite and at worst 4:1 underdog. If he's a perceptive player and knows you know his table image, that makes the call even worse. In other words, he may have known that you know he had a hand but didn't care because you could beat it anyway. In which case, the sixes look pretty ugly. Anyone else agree with me?