This seems to be a common trait among this particular enneatype. I'm fairly certain that I'm a 4 and I've had a tendency in the past to romanticize melancholy or dark things, but I have to wonder if that was because I felt hopelessly stuck in a state of unhappiness and romanticizing it was a means of coping. When I came to the realization that what I really want is to be happy and dwelling in a state of melancholy impedes that, I learned valuable techniques to overcome the "feeling of something missing" in my life and no longer felt the need to be different or special in order to have a sense of self-worth, which is sort of a hallmark of Type 4's. I do still feel different from a lot of people, which isn't surprising considering that a greater percentage of people are extroverted sensors; but I don't think that my differences or eccentricities make me flawed or special in any way. Ultimately, I believe it boils down to having a healthy self-esteem which 4's may struggle with at times.