AGREE!! I forgot about Hopper...he is so amazing!
It's a darn shame they did'nt use him more...or at least let him have a larger part in the show. I always thought his appearence was far too short. It would have been better ( for me as a AA Fan) to have him do some sort of interactive routine with the screened images instead of just the quick comments and brief appearence he makes in the show.
That is a bit of a trend! As well as Hopper, how about the Yeti and Stitch? Top notch AA's, but we only get to see them perform briefly.