This is done very well, love how he's holding a hand over his eye, reference for Naruto fans to the Mangekyou Sharingan.
I see you've done a bit more with shading in this pic, the skin is done quite well but consider adding a second color (for the light source stuff) on the hair, so that it doesn't blend into the inside of the cloak like a black blob. This will also add some more volume so your pic doesn't seem flat. Same with the clothing and the slash across the konoha head band (another reference!)
He's drawn very well, the hands in particular must have been pretty hard (I know I have trouble drawing hands). The expression (in particular the mouth and nose) are done very well, making the most out of your shading.
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