i dont know how much time u spend on each one of these but im guessing not much.if youre just wanting a few colours on for the battlefield then great but if youre striving for 8 or 9 here then youve gotta go mental with detail and technique.if you havent then read up on the forums or in white dwarf .thatll give you a basic method for shading and highlights etc which will make a difference.take this orc for eg,some highlights on the ears,nose,brow,lips,teeth and chin then do the eyes.this will make the face stand out and draw attention