This might be too vague a question, but... I have noticed in most hand histories from say $200NL upwards that the majority of turns are checked by both players. I can see a number of reasons to do this - keeping the pot small, slowplaying, inducing bluffs - but even so I'm surprised it happens quite so often.

I'd like to hear what the regulars think about this - in my skewed view it seems that it should be an exploitable play one way or another! At $50NL/$100NL it hardly ever seems to happen and I'm wondering whether I should be checking more.