It's not my thing. I know it's a huge turn-on for many, many folks out there, but it really just doesn't do anything for me.
It's the dark skin contrasting with the white skin that I don't much care for.
At least not when it comes to porn.
In real life might be a different story. I'm a pretty fair-skinned girl, and while I've never been with a black man, I wouldn't say no solely on the fact of someone's skin.
But I probably wouldn't want it to be filmed, either.
Just a bit of a quirk, I suppose.