looking sweet man, i can definitely see the talent! i can't cnc much since it's a wip and i know it'll change, but i would say once you get a little bit more done, make everything blend more, as i can see the strokes of the brush on the cheeks, chin, temples, ect. the eyes seem copy-paste, make sure you change the lighting in them just a bit :P other than that, it's a solid piece of work.
colour wise i love it, it reminds me kind of a grungy- style head, or like a revamped version of dobby's old head. nice job man, i look forward to see more wips