You ARE improving, but you still need to clean up your "halos". Try Pen-tooling around your image and go to Select>Inverse then Delete to remove the halo before you flatten your image. There are good Pen tool tutes out there if the damn thing scares you as much as it did me at first.
In the Thumb nail this looked realy good, but the full size image on the Blades, belt, and the teeth/fur? on the arms and neck look off. the costume looks well done on the clothing. but the black outline on the aboved mention make it look like they were just cut from a comic booc blown way up and pixalated and pasted into the image.