I like him!
Only 2 things I can see might help. First, the seperation between the face and the arm isn\'t very noticable. Black-lining in the area would help. The other is that the tones of the colors are very similar. If you went into photoshop and took away all color, looking at it in black and white, there would be very little difference in the areas of the mini.
You have a good color sense. The rust plays well off the green. You also base things MUCH better than I do. Good going there! All in all very good for # 12!