It was pure storytelling genius. It was really a coming of age story for the characters as well as the series. So much tension, so much feeling, so much childhood emotion and discovery of one's soul among all the characters present. Naruto's quest for being acknowledged from being totally disrespected in the beginning with no one caring about him. To later earning Sasuke's respect when he revealed he wanted to fight him, then at the end with Gaara where he said "Uzumaki Naruto, eh?", when in the beginning he was one of the people who didn't even want to know his name.