It depends. It's not race-specific but more on the individual. I dated one white guy before and it wasn't a good match. He was a weed selling always in trouble thug type and not that cute, and I'm suburban, shy and proper. As far as physical, I'm brown skinned (not light or dark- same color as Rasheeda link hourglass shape, thick and long real hair. I don't look like a black/white girl, you can look at me and tell I'm obviously black. My nose isn't thin but it's not wide and flat either, it's long but ethnic. So that whole white guys only date black girls that look like white girls isn't really true.
Me and him weren't compatible. HOWEVER, I have seen emo/rocker black girls date white guys and they are the emo/rocker type white guys. Most of the time if a black woman dates outside of her race he's not going to be super ugly but average to cute. It's the black guys that date ugly white girls, not us lol
Most of the time this coupling is rarer because there are less black women who are open to dating out, especially white.