I like what you've done here. Even though you've left some planets and space missing, you've drawn enough there to hint of their existence and make the viewer wonder about them, and that's an added bonus to the picture.
I very much like how you seem to have done a little shading in on his face, etc., really setting his facial features off, imho. He has a very handsome face.
To me, it seems there needs to be some kind of darker shading or bold line or something seperating his body from his arm on the side where the cloak is swung out as it almost looks like his body and arm are one and not two seperate parts.
Glad you colored his hair. And, as always, I think this one would also look fantastic entirely in color...including the planets and any background you decided to use. It could really set the whole picture off well.
Otherwise, I think it looks terrific! Very happy to see this character again! You are improving so much...keep it up!