[Pokerdemic]

You seem to be playing pretty passively on the flop. Hand number three is a bad check with an overpair on that board.

I think a typical way to play them is to raise them, and then play for set value. If you miss the set and you only have one or two opponents, and the board looks good, you can cbet. If it's called, and you have no draws and there are a bunch of overcards, shutting down is probably a good course of action.