So... I've played in interracial games (and have a couple going right now), but I will be the first person to admit that it's generally not my thing over all, and unless the difference in the characters is a key aspect of the story I'm looking to tell, I won't generally go out of my way to get in to a game with an interracial pairing.
Usually because... frankly... I tend to find Caucasian men and women more attractive than men and women of other ethnicities. Not that I don't find African-American, Asian, Middle Eastern, etc men attractive EVER, just that my preferences tend to run more toward men with Caucasian skin tones. It's nothing personal against people of other ethnicities as people, it's just that I don't find them as physically/sexually appealing. I couldn't really explain why, because I have no idea. Just like I can't explain why I tend to like men with blonde or black hair more than men with brown, or why I rarely find blonde women in my purview of "do want" compared to women with red or black hair. Occasionally I find exceptions where I'd be all over it and find them highly appealing, but more often than not, my preferences run toward certain aspects and groups. I also tend to find women with more of an hourglass figure more appealing than traditional thin model types.
I know it's something of a cliché, but I would urge you not to take it seriously. Most RPs here on E have some sexual aspect to them, and a lot of players just can't get in to a story if they find the model their partner wants to use (or the description) attractive. We're here to write something we enjoy. You can't force people to find something attractive. But I've seen a pretty decently large crowd of interracial writers and people who appreciate interracial stories here on E, so I'm 99.99% sure that if you look at others on the site, you'll find someone you mesh well with.