nice ken, but are the wings 3D or just a 2D plane? and then the hair needs something, otherwise great work. make a damn tutorial!
ptoing, I love the black kid and skeleton art. the black kid reminds me of bill cosby's kid show...anyway, look awesome.
Adarias, I agree with MetalFox, it looks awesome. I didnt see any anatomy problems until you showed the 6 headed size. i'd love to see that in pixel art.
Larwick, I really like that girl you made above but to me it comes off as a guy with a nice rack. other than that nice job.