[Johnes Benjamin]

like threads said its obviously good to bet more if opponent is prone to overcalling.
another consideration is that if they are sort of weak/passive i don't want to necessarily have them fold preflop. I make a lot of money getting people to call raises preflop OOP, then check/folding when they don't hit the flop. People get stubborn after awhile and start looking you up preflop light but will still usually fold if they don't improve, when obviously if they don't believe you the proper thing to do would be to either fold or play back.