One way to truly see what your neck curve looks like is to look at a lateral cervical x-ray (from the side).You can see this somewhat on your posture sometimes, but on an x-ray you can be sure: You can see if you have no curve (military neck) , too much curve (hyperlordosis), less curve (hypolordosis) or maybe even a reversed curve.
Check out this special article here:
Proper Neck Alignment: What is the Abnormal and Normal for The Neck Curve
