Okay, so here goes.
I have been doing this for a few months now, trying a little bit of everything. I noticed that I am more successfull when I go by just being myself.
Now, I do realize this is the advice that you get your whole life and it never works in your case. I found out that the reason for this is that when people say they are being themselves they are actually not being themselves. They still put up a front so that they will seem ''cool'' in front of the girls.
When I started playing the game I quickly realized that this was actually my biggest sticking point. I decided to take immidiate action on it and nerded out. Before game I was a pretty big starwars geek. That is why, when I realized this problem in game, I started to own it. I rock a starwars shirt now, and it is awesome.
The point I am trying to make here is that; you should let the girl qualify herself to you, not to the person you are pretending to be.
When you are trying this you might run into some testing and frame battling with the girls you are approaching. The good part is that you will never fail or lose one of these tests since you are congruent with what you are doing.
Now, don't take this to the extremes, you still need some common ground to talk about, so you will need to switch of your interests some time to something you both like or things that she like. But at this point you will already be interested in her so talking about that shouldn't be hard.
I dearly hope that this makes sense since I just felt the desire to write this although I am not that big a poster.