The background really makes this piece. There's something about it. Everything looks great, but I would watch that left hand. All his fingers look as if they are the same distance from us, instead of being in a descending order.
From that vantage point, I feel like his middle knuckle should be larger and potruding a bit, blocking a small of amount of the ring finger. And since pinkies curl inward when relaxed, the pinky would be almost entirely covered by the rest of his hand. You would just see the pinky knuckle and a small portion of the first segment of the finger.
The combination of the dark sky with Riddick illuminated was an excellent choice.
t:
