If I have to err, I'd rather err on the side of looks, because the right personality can make someone attractive, but it doesn't work the other way around. I have to be physically attracted to my mate in order to be with him, but being attracted to his personality will hold out better in the long run. Personally I think I'd sacrifice someone I could look at all day for someone I can talk to all day. All I want is a person with a nice body and a nice personality. A stunning woman who has a bad personality is not sexy at all.
Brains are sexy.
A good sense of humor is sexy. Empathy is sexy. A woman who has a value system similar to mine is sexy. Creativity is sexy. All of these things are more important than looks.