Awesome design, I just thought I'd chime in on the mouth thing. I think the reason why people see the blue hologram area is being a mouth is because of a combination of confusion about the angle of the head and the yellow lights near the top of the head being confused with eyes. If you think of the head as being angled downward at a 45 degrees the blue holographic "eye" is about where the eyes on a human face would be (I think? haven't seen one in a while.) If however, you think of the head as facing straight forward, it makes it look like the holographic area is much lower on the face.
But hey, don't worry about it, it looks awesome either way.