Frankly, ethnicity/race doesn't matter to me, but I do fancy dark brown and pale pink skin, such as Khoudia Diop and Grace Gummer, respectively. If I had to choose one to date or marry they'd have to be white, not just any white woman, though. I like women who are ≥ 5'10", not a deal breaker, though; have a slightly low and sonorous voice such as Joslyn Jane and Siri, as well as thick and toned thighs, calves, and upper arms, a plump buttocks, and wide hips; and possess an assertive yet playful/teasing and self-deprecating personality.
From a strictly sexual viewpoint, this woman wouldn't be afraid to be openly racist, in the popular sense of the term wherein one uses negative terms against another ethnicity/race, and, most importantly, tender and passionate. In a missionary position, for instance, this woman, laying her historical claim on me, would lovingly place her hand on the back of my head and caress it; firmly grab my buttocks; kiss my neck; and slyly whisper into my ear "Nigga like that white pussy?" or any remark based on the historical taboo of interracial sex between black men and white women. All of this would occur as I try me best to satisfy her sexual needs and remain in her good graces—the irony here is key.
Some will say this is idiocy, but when one can find a woman who, in public and private sans sex, is admirable and inspirational, I don't think there is anything wrong with an ego tease in the bedroom.
Oh, here's one more thing. Anyone who seeks out a relationship with an individual of a different background, in my view at least, can't have anger management or self-esteem issues. You'll be torn apart, especially when you intimately interact with them in public and passersby are less than pleasant with you.