I can't speak for everyone, obviously. But it feels like Keith Jackson was one of a truly dying breed. You never thought about whether he was a **** behind the scenes. You just had the feeling that he wasn't, that he was just a good man who was doing what he loved to do and enriched our life experience by extension.
It feels like today, we wonder about the bad side of everyone who enters the public eye. Never worried about that with Mr. Jackson.
EDIT: The earliest known recording of a Jackson broadcast: Washington State vs. Stanford, 1958.