@ThatNerd,
If she is 25 - 28, she has more than likely had her fair share of what you deem to be the "good looking guy" who more than likey treated her like a handbag and nothing else.
Having said that, alot of good looking guys get used as well, by women...
People are attracted to people... Something about a person that stands out, it does not have to be looks.
She's mature. She knows what she wants out of a person and the importance of good communication, fun, laughter, intelligence and simular values, who can stand on their own two feet financially... It's those qualities that are sexy........