I've only seen two ebony providers through agencies and they were great to be with - both were attractive, smart and provided good service. I think the major drawback is the perception or "fear" that she may be "too ghetto" and not as classy or refined as their counterparts. Obviously, I would think this could/would be possible with unknown and unreviewed ladies until proven otherwise, but the same could be true of a trashy white chick. Not to mention that it appears that many of them are associated with pimps, which ads a certain amount of hesitation and unwanted stress.
I love beautiful women regardless of race or nationality. If I find them attractive I'm interested. If they've got good reviews I'm sold (pending my cash flow

).