Avatar is exactly like the Star Wars story, just slightly different.
Star Wars is about the journey of Anakin Skywalker. He starts as an innocent kid, turns evil, and then turns BACK to the good side just as he is about to see his own son killed.
Does this story sound familiar in Avatar??? It's NOT Aang's story, but ZUKO's.??
Avatar is more about Zuko's journey than it is about Aang's.?? Zuko starts out as innocent, just trying to please his father, and then "turns" to the evil side to hunt down the Avatar to seek redemption to his father, only to turn to the good side AGAINST his evil father in the end (this last part is speculation, of course).
Instead of the evil father turning to good WITH his son (Anakin turning to good with Luke), we have Zuko turning to the redemptive side AGAINST his father for his??own soul's sake.
Just as Star Wars was about Anakin's journey (instead of Luke's), Avatar is just as much about Zuko's journey then Aang's.