I am starting to think that "African-American" (or "of African descent" when referring to non-Americans) is a better term to use than "black," despite its origins in politcal correctness.
This is because it frames the issue of race more appropriately, as one of ancestry rather than one of one particular physical difference. So people can't keep saying "duh- so you are saying that having darker skin causes behavioral differences?" No, darker skin is just one marker for race - which is about who your ancestors were, not about skin color, or hair shape, etc.
That is all.