Sasuke is an emo. Plain and simple. We do enough and he can cut himself to death.
On a related note, who thinks the new opening is awesome? I loved the song to it and liked that the video had non-filler content in it. Pretty good overall. If you don't want to have some of the newer developments spoiled, then don't watch though: http://www.youtube.com/watch?v=APE9Y9LlwYs