I wish he wouldn't shout and get OTT when a player misses a shot, pockets a ball, and especially when the white cue ball looks as though its going to go in.
At times I like him -- the problem is when he says essentially the same thing twice in succession. It's not just that phrase, but also just about everything else. "He's on the black... he's on the black!" etc...
I don't mind him, although I do get irritated by his cries of "WHERE'S THE CUE BALL GOING?" The answer is almost always not in the pocket. He should be a better judge of the line than that.