I'm very tight (VPIP 9.62, preflop raise 3.37). Currently running at +15bb per 100 at 5NL. I've recently loosened up with hands like AK/AQ when I miss a flop. With my figures I seem to get away with betting 3/4 of the pot and taking it down on the flop, however occasionally I fire a second barrel on the turn when they just call my bet and they usually give it up.

I'm right in assuming this is VERY read dependent though, they seem to be just calling and hoping something will turn up?