Impressive and nothing short of assume. I think I like the way you got the sunlight to highlight the scene most of all. And this is WAY cooler than the stereo-type heroic human knight dressed in the fancy armor with a sword, (a character type that gets way too overused). Got to love orcs, especially with spears, a good weapon choice.
Even more than the Conan-esque look of the Orc and his relaxed pose upon the horse, I like the colors. The overall feel of this piece invokes a certain nostalgia in me for the Sherwood scenes of Robin Hood: Prince of Thieves, and a strange sort of calm following a bloody victory. And that is why I put it in my favorites.