Orc: love the facial expression you have achieved. I would really like to see in the forums more examples of this (or the maffioso chimp as well), instead of the more common neutral or plain angry facials…
Zombie: Wow! I am eager to see it textured…
Ogre: The left arm position seems somewhat wrong. From the shoulder and biceps I could expect the elbow to be almost visible, but from the hand, wrist and forearm, the orientation looks different.