I got tired of dying repeatedly on the normal difficulty (Path of the Warrior), and decided to restart it on easy difficulty (Path of the Acolyte). When you play it on this mode after tackling the normal difficulty, you can't help but feel the developers are laughing and mocking in an Austrian accent "lookit the little girly man! Do you need a tutu little girly man?"
It's a very emasculating experience.
Even so, the game is solid and fun as Hell, no matter what difficulty you play it on. If you have an Xbox 360 but haven't gotten Ninja Gaiden 2 yet, then there is something wrong with you.