That is a question I have been asking myself a lot lately! Trying to work out why I fall for some girls, but not others...
A strange thing I have noticed is it doesn't matter how attractive a girl is, if she appears cold, or hard to talk to I instantly lose interest... seems the 'hard to get' principle doesn't work on me at all!
Another thing is that my personality trait, that always pushes me to help those in need, and frequently will put the needs of the people over the needs of the objective/task, causes me to constantly appear to attract to girls who appear vulnerable... This means I have a habbit of chasing after girls who are going through some sort of crisis... not only does this make me pick up unnessessary emotional baggage, but also is the quickest route to the nearest freind-zone!! The latest of these was a young lass going through a divorce... I do pick em! :S
All in all, I really suck at this, and need to possibly re-evaluate what I look for, and possibly change my own mind somehow!! :S