Wow, you did such a lovely job with the coloring, and your attention to detail is excellent. The pose is great and you drew the wrinkles and lines very well. Makes me happy to see that set he's wearing: Tirisfal set from BC, right?
I can't see much that could use work. The only thing I might've changed was the cloak; the positioning looks kind of...odd, to me. I would've changed the position or even taken it out entirely, but it's a tiny thing and hardly woth worrying about. Looks great!
In trying to make Blizzard's GIANT SHOULDER ARMOR look even somewhat realistic, sometimes weird things happen. His shoulders are much lower than the armor, but the size and height of that thing throws off the nice figure drawing underneath. =/