I like Jiraya, but you never see much of his strength.....but I guess that is the Ninja way, never show you jutsu unless you really need to. For someone as powerful as Jiraya, he was portrayed as to goofy for my liking. He needed to be a little more serious, more like Kakashi. That being said, Kakashi is portrayed as this really strong ninja, then in Shippuden he seems to become a weakling........