My ex was a nerd girl, ironically enough she was more nerdy than me (this girl was hardcore into RPGs, watched Star Wars, read all the Hitchhikers books, loved Harry Potter, all those sci-fi and fantasy books/movies, etc) and it really got on my nerves that she had a nice body but dressed like shit and never made the effort to fix herself up and look nice. I really wanted her to style her hair better, or dress nicer (she dressed like a soccer mom), or put on a bit of makeup or something because she had all this potential she never capitalized on; when I told her this, she would say "but I get guys the way I am, so I don't need to make the effort".
I don't really know many girls who are all out nerdy though, but I prefer girls with at least one esoteric interest or something that makes them unique, over the waves of dull, shallow girls who have no interests beyond Billy Joel, Grey's Anatomy, "dive bars", and the Yankees (aka 1/2 of the Long Island 20-30 year old female population).