Wasn't there a hint in the book that Fiyero might be black. And I was in Oz just the other day doing some emerald shopping and there are a lot of black people there! :)
Eug, want to know what's even worse than you doing all of that??
Me actually REMEMBERING you doing all of that!
If they are talented and dynamic, changing nuances, phrasings, and notes (eg, SJB) then stay. If they are static and flat, take a hike. Any way you look at it, as stated earlier, Fiyero is a bland role. I even found Norbert a little awkward in it.
I'm not remembering Fiyero being black in the novel, but he did have sapphire-colored diamond shapes on his skin. Norbert tried that in SF at the Curran. It didn't work. He looked bruised. Norbert also sported some sort of blue-ish "tattoo" in SF on his face. I haven't a clue what that was about; it is visible in PBS footage of "Which Way is the Party?".