I understand the argument you're trying to make, but lets be a little more rigorous about this: Lets consider a random sampling of 9 people, German, African, Chines, Mexican, Indian, Canadian, etc. male, female, old and young (Completely random, not biased toward being ascetically pleasing) Chances are you wouldn't find most of them to have a desirable facial structure no matter their race.

Most people aren't really that attractive. Not enough to really stun you in a picture, at least. No matter the race. So the fact that you don't find these people attractive should be of no surprise.

Now compare that to a set of 9 female models, who are all mixed race and have been touched up with photo shop. Chances are differences in facial structure greatly decrease at that point. If you find in this case that you still find yourself attracted to only the girls of fair skin, that's when we have a really interesting situation arising.

I wouldn't venture to call you racist at that point, but it would be hard to convince me you hadn't been affected by a culture that overtly favors females of European decent over females of African decent simply on a basis of skin color.

And lastly, there are definitely feature sets that are largely considered to define any race. As you've pointed out, the group of people featured here all have traits that are classically "black".

For a concrete example, we'll take broad, short noses. If this is a trait you don't like (which is fine), just because you say "I don't like the shape of the nose, I don't care about the color" doesn't make you less prejudiced against African noses. Unfortunately, I know the word "prejudiced" Sometimes make people get automatically defensive. But it is the perfect word in this case, as you've pre-judged a certain set of features to be unpleasing and assigned that attitude to anyone of that descent.

My last point is going to be this. People like what they like. Some people like Swedish girls, some people like Japanese girls, some people like African girls. Your preference is you preference. Stop trying to defend your preference as racist or not and make sure not to push it on other people. Like politics and religion, in polite company that's one that's probably best left to ourselves.