I loved this show! The funniest characters were the puppets (fabricated Americans) who interacted on the same level as the humans, were just as vain and ridiculous as any other celebrity. They all graduated from Harvard (as they sing in the opening credits) and have started this kids' show.
The humans weren't all that as characters, but the writing was great. In one episode, Greg the Bunny is competing with Jimmy (Seth Green) for the attentions of Laura, a lovely female reporter. Greg imperiously tells Jimmy (as Laura only has eyes for the star of the show), "A vanilla cappuccino. Make that happen!" To which Jimmy bitterly says "Yeah, I could make a lot of things happen to your vanilla cappuccino."
Another favorite line is when someone accuses Count Blah of being a rip-off of Sesame Street's "the Count". "HE is the fake! His accent is fake! I am from Transylvania -- HE is from New Jersey!"
Or when one character laments "This party isn't going to be like that time you all came to my house and cleaned out my liquor cabinet!" and another one says "THAT was an intervention!"
Yeah, boozing puppets -- gotta love it!