Board Thread:Theories and Speculation/@comment-3001903-20151205022433/@comment-3965545-20151206042655

Black Zetsu and Madara both called Nagato himself the perfect host for the Rinnegan. He is a full bred Uzumaki most likely.. Nagato had the body and the chakra that came with his body(sages body) Madara's eyes had the chakra and represented the Sages Eyes(S,MS,EMS,Rinnegan) therefor Nagato having the body and the natural massive reserves could use and just about master the eyes. He was never taught the techs Madara used such as Limbo and Shingei just because Obito never knew about them so therefor he could not have taught them to him. Nagato is thus far the only person who has been seen spamming Six Paths techs continuously even through bodies, as a dying little cripple. Prime Nagato shits on Obito with Left Rinnegan. Obito and Madara purposely held back info on certain techs the Rinnegan has(Obito held back the advanced Bijuu sealing chains and Madara held back Tengai and Limbo from Obito.. only logical explanation) which is why Nagato didn't use them... that and the plot required it that he didn't use them otherwise we would not have seen any new arcs lol