My idea of a good commentator is this.. I like the kind who try to define what just happened, maybe use a replay to do so.. Seeing a great shot, then listening to the description & and replay, is a reinforcement of what happened.
The commentators that try to upstage the Players, by attempting to describe whats going to happen & make mistakes, I turn those folks off, real quick.
Jeremy Jones can run it into the ground. Never shuts up.