Beauty is in the eye of the beholder - Shakespear.
Are you talking physical beauty some of the prettiest looking women I have ever met have been the ugliest and some that don't catch the eye have been the most beautiful.
Yes a person's beauty is in their personality yadda yadda yadda - we all know this, but equally I think we all know that SKA is referring to a physical appearance.
For me, I'm afraid, it is fat. I do not find fat women remotely attractive. I can objectively see that some fat women are attractive, but then it goes through my mind how much more attractive they would be if they were slim.