My favorite character that Richard's performed?
Well, Scooter's at the top of the list, definately. I like him because he seems to be on a different level from the rest of the "core" group (Kermit, Piggy, Fozzie, Gonzo); watching the craziness unfold but not always taking part in it. That's one of the reasons why I enjoy playing him so much in Theatrical Muse, because it gives me a chance to get inside the character's head, and by default maybe get into Richard's head a little.
And then there's the Wild Impresario, from Ghost of Faffner Hall. He reminds me a bit of Scooter, except Wild's enthusiasm is centered around music rather than just being a general enthusiasm. I also see Wild as one of the two "parental" figures around Faffner Hall (the other being Fughetta, obviously. I can't see Farkas being a parental figure to anyone). He's been around the block several times (hung out with a gang in his youth, dated Joni Mitchell), and now he wants to pass his experience on to the younger generation. Wild's also quite crafty; he spent nearly half of the composition episode trying to keep away from Farkas, then finally used the other man's greed to get him to lay off by mentioning the big prize for the contest.
I also can't leave this post without mentioning Gillis "The Maestro" Fraggle. He's just as important as Cantus and the Minstrels, perhaps even moreso because Gillis stays in the Rock and leads the music, while the Minstrels only come around every so often. I like to think that in his youth Gillis was also a Minstrel, and when the group first journeyed to the Rock something made Gillis decide to stay.
-Kim