Continuation Bet/Check Behind

[fanmail]

I have a question concerning continuation bets rather than a specific hand. Lets say you are at a table for quite some time and there are some familiar opponents. You play tight aggressive, raise strong hands and also several other hands in position. Your image is that of a winning player who usually shows down the goods. You take down a lot of pots by raising pf, getting a caller or 2 and then betting 2/3 to full pot on the flop and getting opponents to fold. You do this almost every time you raise. My question is, when you raise preflop and have position on the callers, how often do you check behind instead of continuation bet especially if you fear a check-raise? I know it probably depends on the opponent, stack sizes and the strength of your hand/draw. But I just wondered if many players check behind with say, an AK on a Q47 flop.