I don't know, this one doesn't speak to me. I can't piece together any meaning behind the skull, and the character's mask and posture are mostly neutral. There's no distinct background to ground the character in an interesting situation, either.
Okay, so maybe it's just a character portrait... but looking at it this way there's not much to see. There's in interesting mask, but otherwise most of the body is low detail or in shadow, and then we're back to neutral posture.