I have the opportunity to do color commentary for the TV broadcast of a large regional marathon. I know what I don't like in race coverage when I hear it (Tom Hammond, Larry Rawson, Al Michaels, the screamers at FloTrack), but I don't necessarily know what I do like because there are so few examples (Tim Hutchings being one).
What would you want to hear? What is missing from race commentary? Link to good examples on YouTube or reference good announcers or teams (from any sport) if you can. I'd like to make our sport worth listening to and understanding better for the average viewer.