I can't really speak to how it looks compared to whatever reference you are using but I would say its a good sprite overall. A few critiques I can give:
* The black on the left side of the characters face seems odd. I am not sure if that is supposed to be shadow or some partial mask. In fact, I would say the black outline is a bit misused in general. It fits in some areas like the darkest areas of the legs, but it looks out of place as a partial outline in the hair and hands.
* You may be trying to cram too much detail into the hair with the red and white.
* If this is a front view pose, then the bottom left foot of the character shouldn't be at an angle, unless he is standing on the balls of his feet but in that case you could make some minor improvements to help that read stronger.

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Looking to collaborate. Hit me up, especially if you are a GM programmer, or if you just have some sweet ideas.