/ic/ - Artwork/Critique

Thoughts on these head tilts? I wanna keep their necks small, but that's cause a problem since there's that "shelf" that separates the bottom of the jaw from the neck, and in the back the neck doesn't follow the cranium, but I figure the insertion for the spine, the atlas would be much lower to make it work. If anyone's found a creative way to address this and they know how to make it look good, I'd love to see it. Same for where characters tilt their heads up.