My first impression of this was, great palette, pitty he hasn't made the most of it.. atm it is very flat, it's as if you've only thought about Making what you've got smoother, which is really uneccisery as it doesn't even look as if you have a lightsource..
Use that blue you've used for AAing the highlights to add more depth to the character, same with the hair, those colours work so well.

.
Just think about how the character body will react to the light around.. And you can't go wrong,


Im rubbish at feet, so ignore that on my edit..

oh and don't be afraid to use a colour other than black..

also there are probably some anatomy issues, but it looks great to me..