AA and KK are the two best starting hands. You want to be aggressive and cut down the number of opponents in the hand. Passive play with either of these hands is a recipe for disaster, especially in a loose/passive game. Raise and re-raise with them. The odds are in your favour.
it all depends on the opponent you are playing with. if he is aggressive then do not rush to show up immediately lure him postflop he will show up with you. but if you're in a vacuum the play is standard