I loved Max's voice from Hit the Road and the cartoon. That distinct New York flatness really added to his playful mania. Now he sounds like a generic prepubescent with a cracking voice (Sam also seems a little too listless and has lost his trademark "shush"). I'll probably get over it, but why didn't they use the voice that Max had in the trailer? It had a similarly playful drawl, but was less region-specific. It's a more unique distinction.
Yeah, I suppose I'm being a little anal, but whatever.