Yup. Those two bother me the most. The guy playing Sokka was in the Twilight movies so you know he's there to cater to the tween girls. I don't get the actress playing Katara. She hasn't been in much and is as whitebread as someone can look. It's almost like the person in charge of casting was looking at the actual voice actors rather than the cartoon for reference.
Speaking of Sokka not being funny:
http://www.aintitcool.com/node/43869