It is worth saying that as undesirable as "African-American" is, "black" isn't all that desirable, either. Much as Spider Robinson's cluricane said in The Callahan Touch", 'black' has long been associated with everything bad and scary, and it is wildly inaccurate at that. At least "colored" had a little class, although it's not very accurate as well. So did "Negro" for that matter. It may be derived from a word meaning 'black', but it doesn't SOUND like it to an English speaker.
Of course, on the Internet, none of it matters; for all you know I'm a furry critter from Alpha Centauri, and that suits me.