In total though I really like your take on the Minecraft baddies. There is awesome realistic anatomy and detail that gives an uneasy "gross-ness" to them but maintains the cubic style of the game with all the shapes.
These pieces are all complete works of art, the characters are masterful and the backgrounds capture the dangerous weird feeling of an undiscovered land and in some cases (The creeper and the Enderman evokes kind of a mystical melancholy.
Would totally buy a poster of this guy for my wall.
I do believe that this would effectively eliminate the problem of "too many little kids on servers". It would also create the problem of "omgwtf why did i lock my map on normal difficulty" (for those who have 1.8)