Thank you for your feedback, I will take your comment into consideration.
From the face alone it looks like you have a strong understanding of human anatomy and how light interacts with the form of the head - and the rest of your gallery supports this. But with the hair and the neck in this picture especially, you seem to start from the edge/outline of the surface with a dark colour and work inward a colour at a time, reaching the brightest colour in the middle of the form you're working on. This creates a phenomenon known as 'pillow shading' that doesn't serve to describe the form you're trying to get across in pixels or suggest a receding shadow across the form, but makes it look completely flat instead.
This picture almost makes me wish the Pixeljoint picture viewer came with a toggle to view pictures under a CRT-filter, since that seems like it would greatly compliment the arrangement of pixels you've put together.
i see anything vaguely resembling dracula, i press the like