I like what you're doing with the pureblack hair. That, plus the gently shaded face really makes it compelling.

I do notice, though, that some features are really sharp and outlined that would probably look a bit better if they were blended more. You might like to check out www.rebekahlynn.com 's tutorials for some tips about that.

But you're doing a great job paying attention to details--the different shapes in the eye are really well defined.