Hmm. I'm honestly a bit confused. The 3D preview shows a different skin then the skin that's downloaded. I'll guess I'll review both!
The actual skin:
The "shading" is very poorly done, all you did was fill the body with black, and just have a red block head. (oh, and a little l for a headset)
Overall, not visually pleasing. Especially with the colors chosen.
Your other skin is pretty good. (The indianna jones one)
The 3D Preview: (If it is yours)
It's nothing out of the ordinary. It looks good, not very shaded. But good looking.
I like it.
You should try to take your time on skins, try looking at tutorials and getting nice looking palettes.