[Dazarath]

My standard line is to raise because you have two overs and the nut flush draw. You may very well have the best hand at the moment, also. Oh, and all the reasons the above poster listed. If you're only calling, then I like a raise on the turn, but usually I prefer to pump the flop when my equity is higher.

On the turn, if SB is still in, I'm going to see the river for as cheap as possible (unless I hit a diamond/ace/ten), meaning calling if BB donk bets again, or checking behind if given the opportunity, and then I'm folding UI to a bet most likely. If the SB folds, then it's more likely that I'm seeing showdown. So I might bet the turn and check the river behind, if allowed.