You have a continuous style in all your work (it seems) but this one, with the obvious and sinister face, is my favorite so far. The black border finishes it off nicely. Thank you.
That face on the left is something of nightmares; in comparison the one I'm making out on the right seems somewhat gentle and kind, with a subtle smile spread across its lips. It's amazing how you can render a sense of nightmarish terror through your forms and "faces". Beautiful contrasts as always, I love all the forms and your characteristic colors!