This is counterintuitive to me, and it's happened a lot. I'm usually most interested in a girl who isn't the prettiest for personality reasons, but it seems like the prettiest girl always ends up trying to talk to me the most, and the other girls almost seem to get shut out of the interaction.

Why? Is the prettiest girl just the one most used to random guys coming up to her and striking up conversations, so she knows how to hold a spontaneous conversation?