I'm gonna go all controversial now.
From what I've read about the old GB, they don't sound very nice *at all*, with one or two exceptions. Nor especially intelligent, when put on the spot. Even Ray Franz I've heard was rarther gruff and could seem a bit rude on occaision.
Now, I can't imagine today's GB getting offered a position without being at least a bit likeable in person. Its just such a big corp now, and as you say so media orientated - with meet-and-greet's - you'd at least have to be a bit personable.