suited connectors when raised desquise your, when a villian has top pair and call u down.

when limped they are played for straights and flushes.

don't play them with top pair unless u know you have the best hand. otherwise you will get burned.

I too find them very profitable when limped in in multiway pots or when I raise em in late position and I flop something great, and it is hidden cause villian thnks I have some pair or AK, AQ, AJ and so on.