He may not actually be funny, but his manner leaves open the possibility that there's a joke somewhere that viewers missed.
Some will keep watching to see if they can figure out what the joke is and what's so funny.
As TV people go, he's far from the worst.
He’s never been the same since Bill Clinton cut off his nuts after a question in the Rose Garden back in ‘93 or ‘94.
Britt Hume became a serious Christian after the loss of his son to suicide in 1998. His naturally wry manner is thus reinforced by faith and life experience that give him an appreciation of our fickleness and of the shallowness of our obsession with the new and shiny things that pass by every day.