I guess it terms of balance, Eight Gates is pretty cool. It was, or could be they say, pretty damn powerful, but at the same time it put massive amounts of strain on the user.
There aren't that many techniques with high risk with high reward; there was one other though. The rasenshuriken couldn't be used consistently because it destroyed cells of the user. Not only that but since it was a just a more powerful Rasengan it couldn't be thrown, despite it resembling a shuriken. It seemed like it was mostly about the explosive power behind it and it needed to be controlled until impact. Then Naruto was able to throw it. Throws out everything negative about the move and it just a super move.
Ahh...finally back,after 1 week full of work and charity non-stop. Heck,so many replys!? this is great! thanks guys. And alas,able to rest easily, but never thought this stupid topic of mine could reach 4 pages. Ahh...thank goodness,i'm broke,again!? oh...and i did trying too hard,cause now my back is killing me.