An attractive black chick over an overweight white chick any day >_>
I've dated one black chick and another "mystery" chick (to this day, I have no idea what her ethnicity is), but to be fair, they both seemed to be culturally "white". On the whole I think white girls are more attractive than dark-skinned black girls (medium/light-skinned it's about the same as with white girls), but I definitely think that good-figured dark-skinned black girls are more attractive than a chubby white woman.
I'm notoriously picky though, and I look for a lot more than appearance in a woman. tbh, it would be an inconvenience if she were black because a lot of members of my family are racists (though tbbh, I'd disown the lot of them for the right woman)