THE SOUTH. Hands down. I've lived in the south for a few years and have spent significant time in each confederate state minus Mississippi. That's enough data to say I'd take a 6.5 southern belle days before a 9.5 northern girl. The difference in ratings is equivalent to the variance in Hawaiian wave heights vs the Spicoli scale.
Girls up here are angry, unkempt, self-righteous, disagreeable, uptight, non-adventurous, and come with an insufficient dowry.