First of all, Nagato was a character foil for Naruto - he was developed relatively well, had a reasonable back story and had many connections to Naruto, direct and indirect. He was another, what Naruto could have become. In my oppinion he is the best villain because he broke Naruto's spirit (almost) completely. At no point ever again did that happen to the extent it did. Naruto was damn near ready to give himself up and surrender to Pein to bring peace to the world. Naruto's will which was stated to be a special power of him or something was broken. Pein proved to be a masterful manipulator and a grey and complex character. Orochimaru didn't kill his will; neither did Gaara; or Sasuke; Madara and Obito damaged it, but it didn't seem Naruto will actually give up, simply a small state of depression. Now what do you think? Discuss and debate 