Very well drawn. The shading is very good as is the detail. One of the better pictures of Sasuke Uchiha I've seen. I like the angle you drew it at. Very good impact on the eyes. Speaking of eyes, his sharingan is very cool and noticeable.
His head is a bit off as are his marks. But just a little bit. His collar is kinda too big. And it would of been nice if you didn't hide half his face but it makes him look more emo or angust however you want to look at it.