I would have to say personality..definitly for me..I just met this girl, who is fine as fuck, I am really attracted to her, but as far as communication goes, zero, nada..I can barely even communicate with her, 2 different wavelengths...we are nothing alike..looks like she will just be a booty call..forgive me...haha I have to be stimulated physically and mentaly to really like a girl..and I have to be able to communicate on all kind of different levels..