Nothing special, Ha! I like this one, even though you seem to not appreciate your work on it. While seemingly unrealistic (a little deviation from your other works) with the lighting around the planet, you manage to prove a deeper point than just expressed in the image itself. And that, my friend, is what makes a great picture.
It's nice, but you realize that at the moment you have the top and bottom lit up more than the sides, which does not make sense of the light source is directly behind the planet. It should be evenly lit up on all sides, and probably less than on any side you currently have there.