Really good! EXCELLENT acctually. A little crituqe (or however you spell it) The nose is a bit wierd. Not to be mean, just. Meh, Great Job anyways! Much better than I can do. What I wish to draw like in the future!
Well done. Especially his arms and hands, and the one he's got on his leg, and how you captured his cape is just masterful. The background could have been a bit darker, but this way it properly contrast the darkness of the character, and brings him into focus, without being jarring. Good choice. You don't happen to have a wall-paper sized version hidden off somewhere? Because this would be a perfect one.
WHAT! 10 hours!? Wow... You've spent so much for this? Got to hand it to you, that's some dedication!! Uhh, not sure if that whole time is showing in there, though... But aside from the time, it looks great!