The generic white muscled male, who can do anything the plot throws at him (with only a bit of fake struggle), and gets the girl at the end, is so damn overdone in every media. People talk about characters being Mary Sue when John Sue is way more common.
I want variations in my fiction! All kinds of genders, preferences, cultures, opinions, and species. The only rule I have is for the fiction never to encourage cruel acts IRL.
I'd say the avatar series in general is good at having diverse characters who are complex. I know Korra gets a lot of shit but I personally really liked that they tried to have an avatar actually suffering from mental illness.
That was a coincidence, I've just started watching it! Season 2 now. Love it so far. But Sokka don't deserve being such a buttmonkey, considering how often he is right.