Mid PPs with an over on the flop are a good example of a marginal hand too. They are easier to play in position, and a lot easier against tighter players (smaller range pre flop makes it much easier to know where you are post flop). OOP against a tight player sometimes you have to check the flop - if they will only call a c-bet with hands that beat you, then there's no point taking down a dry flop when you could induce a bluff on the flop or turn and gain a few bb's in the process. The more draws on the board though, the more you should be inclined to bet.
I'm a bit confused. I cbet quite a bit (90% of the time but small sample size) because I play tight ie. not a lot of hands (about 11 VPIP). If I'm up against a tight player with say 99 and the board comes 4,8,Q rainbow....I always cbet. I agree the only hands he calls with are hands that beat me but there are so few of them that he would hold, wouldnt he fold most of the time? If the flop was something like X,K,Q then yes....I put the breaks on.
there's no point taking down a dry flop when you could induce a bluff on the flop or turn and gain a few bb's in the process
But if they are tight players, how do you know its a bluff? If we dont want to cbet them, why would we be more willing to call a bet on the turn from them?

This is an area that I'm trying to work on.....I know I cbet too much b/c I dont know where to pick my spots well. I dont like cbetting total call stations b/c if after the flop I have say AQo and the flop is 3,6,T with 2 suited, I have a hard time putting him on a range if he calls me. If he's a station he'll call w/ his pair of 6's or 3's, he'll call with any FD. If the 3rd suit hits I'm at a loss. If he holds something stupid like J6, well he still beats my A high...

There's just so much to learn.....its fun but overwhelming. I look at what I knew 6 months ago and I laugh.....hopefully I can laugh in another 6 months at what I know now....and Im doing great at 2nl...