Originally Posted by
Buffalobiian
Okay, first of all, are these "facts" in your post something you're assumed or gathered from the anime (son relationship, Obito), or from the manga. If the latter, please keep all manga discussions in the manga sub-forum in the future.
Otherwise, how come you think Kakashi favoured Sasuke? If you're talking about his teaching him Chidori, it's because it's a skill that's only usable with the Sharingan, and that he was the only other person in Konoha who could teach him how to use his eye. Secondly, he was able to palm Naruto off to the Hermit then, which IMO would have better techniques for Naruto than Kakashi. Remember that Kakashi was a genius, like Sasuke, and while having a low chakra capacity, is able to use his brain to get around that barrier.
Naruto is blatantly the opposite, and if not for his ridiculously huge chakra capacity, he'd be dead a long time ago. Jiraiya wasn't as sharp as the genius of his era (Oro), and as the Third said himself, his only real strength was probably his cloaking techniques. In that regard, it would only make sense that he takes Naruto under his wing, while Kakashi spends more and more time with Sasuke.
As their sensei, Kakashi also noticed the darkness within Sasuke's heart, on that isn't present in Naruto. He said in the beginning of the Sasuke Retrieval Arc that he taught Sasuke his Chidori to protect, and not for revenge. I think he also said that he was similar when he was young, and that revenge gets you nowhere.
Basically, I think Sasuke needed a lot more counseling from Kakashi, which might make him look like he's favouring him over Naruto.