I have serious questions about Madara, but before that, I don't get why some people believe Madara did NOT give Nagato his Rinnegan? As of Manga Chapter 606, it has been clearly stated that Madara transplanted his eyes on Nagato, Zetsu says that Nagato himself didn't even notice. As for how he did that, I still wonder.
When it comes to Madara's existence, I have so many, and I repeat SO MANY questions. The first one being a HUGE contradiction I hope somebody here or Kishimoto himself makes clear to me: Just what makes it possible for Kabuto to bring Madara back from the dead, and not someone like Jiraiya, who died way sooner? I thought there was some sort of restriction regarding the state of the DNA sources that one could use to perform a successful Edo Tensei. Say, in Kabuto's demonstration to Obito, he used Fuu's blood to bring back Torune, the blood being the DNA right? So how in the HELL did Kabuto gain ANY source of DNA from Madara?
I was thinking that maybe Obito would be saving some parts of Madara's DNA, but as they themselves have stated, the plan was for Obito to use Gedou Rinne Tensei to bring Madara back, so what would he save that DNA for? Furthermore, there is the issue with Madara's young appereance. Why would he look like he's 30 when he died being way older than that? Isn't Edo Tensei supposed to bring you back in the same way you were while dying? And this has me very frustrated because ever since Kishimoto's fiasco with Obito's flashback (the so-expected explanation to why was he so adult-like when the Kyuubi event happened in Konoha, seeing as he would only be 14 according to canon timeline), I somehow get the feeling that Madara's reason for looking so young is probably something very stupid.
Anyhow, Madara's looks per se are not so much of an issue for me compared to the fact that his Edo Tensei is the one that twists this technique's restrictions the most. I mean, come on. You can bring Hizashi, or Salamander Hanzou, or Kimimaro, or many other characters with 2 years or more being dead, and even then I wouldn't give a shit if you just made it SLIGHTLY logical. But Madara's case is just too much for me to ignore. He really needs to explain how did Kabuto manage to do this, and let's not talk about Kinkaku and Ginkaku (whose death was BEFORE Madara's, and yet they were back from the land of the dead as easy as pie), a topic way more frustratingly hard to understand than Madara.
Why did he save Obito? More than clear. We can guess the reason for Madara's actions by merely looking at Obito. Obito's like another version of Madara. He doesn't give a shit about anything, he doesn't need any friends or allies, he doesn't need any love, he doesn't need anything. He just does what he wants, what he's planning, and uses anything or anyone he might need to use for his own purposes. That alone makes me think that Obito had Akatsuki as his pawns, and Obito himself was Madara's pawn all along. Quite against this, though, is the fact that they couldn't use Nagato for reviving Madara, and now he has to rely in Obito to be brought back. Ergo, Madara ends up being Obito's bitch... For now.
May I also mention that so far, from all the "villains" we've had, both Madara and Obito are making me wish I was a girl, and a fangirl at that. Call me gay ot whatever, but I have a mancrush in them. The way they belittle EVERYTHING others do, the way they see them as mere flies, weak flies, the way they laugh and mock people for their incompetence... This is what I enjoy as a villain. Madara's attitude against the Five Kages was just like an eye-gasm for me. And then the way Obito had his mask blown and Kakashi broke emotionally at seeing him was another eye-gasm. I'm loving the manga right now. I wish Kishimoto was a little more concerned with the little details (which is the reason why Eiichiro Oda surpasses him), although I am also aware that I could be perfectly wrong, and my understanding of the Manga could not be as good as I think it is. But oh, well... I hope I can get more of BOSS-mode Madara and Obito.