Zuko is the best because he is turning into a good guy. But I must admit, his character would not be nearly as interesting without his uncle Iroh teaching and bugging him. As far as the good guys go, sokka is intertaining. So is Aang, but he also get's a little annoying. My personal favorite is definately momo. I love his little squeak-squeak background music whenever he gets into mischief. There should be a voting circle button thingy for MOMO! GO MOMO!