Neptune represents our subconscious mind. It is associated with dreams, inspiration, psychic receptivity and illusion. It is also associated with intuition and spiritual enlightenment. It is also a planet of mercy and compassion. In your chart, if Neptune is well aspected will indicate a great inner sensitivity, to manifest dreams and become highly creative. Negatively, it will indicate deception, deceit and addiction.
Neptune Sextile Midheaven
This aspect signifies that you aren't particularly interested in being self-assertive, that you prefer to live in a quiet and peaceful world of your own making. If you cannot find anyone else who shares your attitude, you don't mind living alone. You do not really care that much about being with other people, because they interfere with your excursions into the private world of your dreams and fantasies. but you don't dislike people; in fact, you are very sensitive to their needs and wants, and you feel that you should be of service in some way. In youth, you are very interested in ideas that others of your age usually ignore, such as religious ideals (at a rather simple level of understanding while you are young), and even occult beliefs; a love of the mysterious and supernatural. Because you are quite sensitive, you need to be with very positive and supportive people. If you are with people who harbor many negative thoughts, you will become a victim of their negativity and feel very unhappy. Also, such people would make you feel suspicious of others, when you really want to see their finest, most spiritual side. Your parents should support your efforts to see the good in other people, so that you will grow up to be a loving and unselfish person whose presence makes everyone's lives more beautiful. Without this support, you will be a rather retiring and shy person who avoids contact with others for fear of being hurt.