To dream of your own neck, means that it connects two different parts of human body: the body and the head. The neck is like the wheel, therefore if you dream of it being strong it shows your personality being powerful as well. If the neck is lean, you are very vulnerable person. The neck for women and men can have different explanations, therefore the woman should have a lean neck and the men should have the strong one.
Read more about dreaming of Neck in other dream meanings interpretations.