In terms of marriage, probably the average-looking girl. Looks fade, and those who are hot when young often tend to have issues that you can't overlook once those good looks are gone. It's a failing of men that we can overlook them to begin with.
When I was 22, I dated a stunning 28-year-old. Tall, brunette, busty, and spunky...was fucking awesome! After I graduated though, we drifted apart, though still kept in touch. And with that separation I began to remember the parts that weren't so awesome. The selfishness, the lack of substance, etc. Eventually she bagged a rich banker guy (a friend of mine). Fast forward to now and she makes him miserable as hell. She's desperately trying to cling to her youth, and has had several rather poor cosmetic procedures performed in that pursuit. Her spunk is gone, replaced by bitterness and envy. When I last saw her four months ago she was drunk and actually tried to make-out with me and give me a handjob, rambling about how great we were together and how she missed that. I got the fuck out of there.
Obviously that one instance is anecdotal. But the general rule holds: beauty is mildly, negatively correlated with character. That goes for both men and women, though I believe the correlation is stronger in women because of historical standards surrounding beauty. For men I think the correlation is between power and character.
ha ha ha
