With all the crap TW seems to slap the Batman franchise onto, I really miss TAS. My only gripe was that we never saw AZ in an episode. Batman Beyond just didn't hold my interest.
The Clayface episode was a riot, with all kinds of in-jokes.The Ra's/Jonah Hex episode also stands out as a favorite.
And 'Mask of the Phantasm' out-movied all of Burton and Schumacher's crap.