Yeah, Sybil's okay. I think it's good to have a character to slow things down a bit, and she can be comedic gold when she gets to react to some of Max's suggestions. A bit overused though.
For least favorite... Since the Soda Poppers feel a bit taken, I'll go with Jurgen. Sorry people, but to me he's just annoying. Not funny annoying, just annoying. Besides him, Harry Moleman isn't too high on my list either.
Signatures are for nerds.