I really like the overall effect, and as mentioned, the shuriken rock. The coloring effect, though, and the lines around them made me think they had been touched up in photoshop. I guess that just attests to your skillz. Also, pleased to see you lined the shirt in white. Some people forget that detail.
Things I would suggest changing... The shoes. It looks like you are wearing boots. Having the naruto-style sandals would help the impression, I think. Also, the vest would look more impressive if actually styled after the anbu vests; puffy, with the zipper in the front and the little roll-puff on the bottom. It would help make it look more Naruto-world authentic. Also, the line of the pants. It makes me think he's more ravery, for some reason, than Anbu-esqe. Perhaps they flare out a bit too much, even if they are straight legs. Maybe the leg wraps, or shin armor seen on some anbu to help balance out the white from the mask and vest. Or even the metallic look you got on the weapons and arm guards.
Great work, though, on an original concept.
Makes me think Sasuke really was/is an anbu.
And for photos, try to find a background that isn't so busy - a single color wall, or outdoor photos, or something. It takes away from the effect of the costume.
I also want to know how you did the mask... the shape of it, not the painting. It looks cool. Did you buy something? Make something?