I love it. The black outline really does something for me, and the line art is great. Nice colouring job, too. I did a slight edit:
I changed very little. The skin tone I altered slightly, and added a new mid tone for blending purposes. I changed the arm a bit, too. Something about the way you defined the bicep seemed strange to me, given that there is little to no definition anywhere else on the body.
Other than that, I eliminated several colours. Some were virtually unused (maybe one or two pixels) and others were so similar that they could be merged.
Finally, I took out what little selout there was, as it was inconsistent (only used very sparingly, and seemingly on one side of the body).
This looks very nice. Keep the great work coming.