What message do girls like the most?

Ladies, (especially young ones) What kind of message do you really expect from a boy? I mean what is it you really want to hear? Please don't say this "everyone likes different things", what are the universal ways of grabbing a girl's attention? Commenting her profile? Saying lots of compliments? Asking thought-provoking questions? Or telling information about ourselves? What motivates you to answer with the highest probability? What is it that you really don't like to hear in the first message?