I have to disagree with you guys about the curse seal. It was a power that was given to Sasuke by Orochimaru. Its not his power to begin with, it came from someone else. Sure he can access it at any time, but its still not really his own power.
As for the Sharingan Sasuke had to earn it. It may have been in his blood, but something important had to happen to him in order to activate it. And to take it further other important events had to happen for it to evolve to the 3rd dot. Not to mention other events in order to get the MS, which as far as we know he hasn't gotten yet. Each form of the Sharingan required hard work and growth as a person. Its not like its something he got automatically as he got older like with puberty.
As for Naruto. Its said somewhere in the manga that the way the seal is set up so that the 9 tail's chakra will slowly come out and mix with his own chakra over time. So in a way the power really is his. Its only on curtain instances where a large amount of the fox's chakra comes through. There have been plenty of instances before the time skip where he was able to use the 9 tail's power without changing and was able to control it. Like during the fight with Haku. In the Forest of Death fighting agains Orochimarue and his snake. During his training with Juraiya. And the fight with Neji. All of those times Nartuto had complete control over the 9 tail's chakra. So you could say that the power is naruto's since he has to do something in order to get it.
Its only latter that the tails start to apear and the 9 tails somehow exerts control over him. But like I've said in another topic I think that is just a sign of how far the seal has broken down over the years. I think that if it ever got to the point where Naruto had all 9 tails that the seal will completely break and the Fox could either take complete control of Naruto and devour his soul, or escape from naruto's body completely and retake its original form. Either way Naruto is screwed.
Naruto's Kyuubi chakra doesn't count as his own because he doesn't have control over it in the sense that it makes up its own decisions. I doubt 4th tail Naruto wanted to slap Sakura and poison her with his chakra on purpose, it was the Kyuubi that did that not him so technically Naruto wasn't even in the equation making it not his power.
A pie in the sky?
A pie in the sky?
I have a question for those that don't consider the Kyuubi to be naruto's power, and the cs to be sasuke's. If I am fighting someone and I use a skill that I was taught, a kick for example, am I using my own power? Also, if I am in the same fight, and I use a sword, am I using my power, or the swords power? If you say no, then that means no one in the world is actually using their own power ever. Everyone is using the power of the kick or the power of the sword to help them. If that is the case, when is anyone ever using their own power?