@Vree  
Wow, thank you very much for that long comment :3  
It help me a lot :D

Regarding the shading: squint while you look at it (so that you’re not looking at the lineart, but judging shapes by the depth of shadows) and tell me if you see what I see. :D  

 
I like it how you split the nose into separate planes, but it looks rather silly the way you always moved the light part in the MIDDLE, and also how each plane is mirroring the light in the front perfectly even though they aren’t actually facing it.
 
You can actually buy mirror-faced Rubik’s cubes and what you will see on them is that even though they are all mirrors they still have brighter and darker sides, reflecting only what they “see from a certain direction. You also shouldn’t think in “tiles” but more like treating all of the bits of the face facing front as one big plane.  
Edges on the FRONT should not be dark as they are even CLOSER to the light source in fact; only the side that is in fact hidden away from the light source by the same edge should be dark.  

 
Actually when you look at a photo like this:  

 
You can see that the difference that lets you tell apart the nose and the face behind it is a minimum amount of contrast, only a slightiest darker shade of gray, maybe even non-existant. What helps you tell that it IS a different part isn’t actually the edge, but how the shades define the shape of each part.  
Putting a lot of light in the middle with dark valleys in between creates the illusion of round surfaces next to each other.
 
PS. Very nice pic tho :D loving all the effects.