I have to agree with mtmckinley...I definately think the head could still use some more tweaking, particularly the nose and mouth. Also, the top of the head seems a little too "flat" to me...maybe try elongating it some more. You may want to use some references for help doing the nose and mouth.
~CGPMaya84 (also DragonTU84 from SimplyPhotoshop and CPAnimate84 from SimplyMax)