We are attracted to different people for different reasons. Some would say that we are attracted to people who have qualities that we may need to examine in ourselves. Those qualities in her that you are attracted to are the same as the ones in yourself, and the ones you are not so attracted to are the ones you least like in yourself. I believe everything happens for a reason. If you are that attracted to this girl whom you would normally not go for then I suggest you look for the lesson in this. I would also be interested in her age. What you are attracted to could be the woman she has the potential to become.