Hello Modog!
I just took a look at your piece and found many colours that seem to have a low usage compared to others : O
This is a page that analyses your piece(s): http://yanrishatum.ru/pj/?input=http%3A%2F%2Fpixeljoint.com%2Ffiles%2Ficons%2Ffull%2Falbano1.png
Once hovering on the single colours in the list, it will show you where they are (marked red on the piece itself).
Cleaning up pieces helps you to remain control over it : )
Beside that, I think you could position the bright hair highlights (#fac9b0) better. I would recommend to place less solo pixels and rather group them into clusters.
If not yet read by you, I would suggest taking a look at this great pixel art guide by Cure: http://pixeljoint.com/forum/forum_posts.asp?TID=11299
Thanks for the anwser!