Well you do seem right about adjusting your sign to the other persons sign so its succesful. You should read up on Dr.Paul. He talks about 4 personality traits, A King, Warrior, Lover, and the Magician.
Its kinda like your astrology thing or even the same without having to know their sign. You just have to know what their trait is.
I would go into deep explaination about the 4 traits and how you would adjust your trait to seduct the other trait, but it seems like you covered it. Maybe I will post about the 4 traits and how you should adjust accordingly later on.
You can find this material on David D cd's "Dr.Paul" or/and I will post the 4 traits when I have time.