Another caveat is surrogate behavior-- what's tested is which photographs women chose, not which men.

It's occurring to me that part of what annoys me about the "women prefer jerks" meme is the implication that women are distinctively irrational. There are men who chose women who mistreat them, sometimes one such woman after another, but I've never heard anyone say "men prefer bitches".

Just on the notion level, but I've wondered whether some women (especially young women) choose bad news men for the same reason that some men (especially young men) ride motorcycles-- risk and excitement. From what I've heard, one of the reasons women chose difficult men is the hope of being able to change them.

Another possibility is availability bias-- the stereotype is the woman who spends years complaining about the awful men in her life to a patient male friend who's wondering why she never chooses him. Women who are happy with their relationships aren't going to do as nearly as much complaining about them, and probably aren't going to be talking in comparable detail about how good the relationship is.