Iroh, Sokka, and Fire Nation Leader Dude(He's so lame I can't even remember his name) voices were the only ones that were good. One of them was Mako(God rest his soul ;_;) so it was automatically good, and another was Mark Hamill so that's auto good as well.
Everyone else had generic or weird(Zuko specifically) voices.
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Oh SuperNiceDog's doing it again dude.
SuperNiceDog, you ain't no pimp dude