I don't think the elaborate hidden fantasy life of schizoids would be much mentioned as a distinctive trait, if it weren't for the stark contrast to outwardly appearances of this group of people, who tend to appear as dull, emotionally cold, detached, of reduced or flattened affect. Only few people are allowed to glimpse behind the emotionless veneer, if at all. If they were, they would be in for a surprise.
A lot of my hidden internal fantasies revolve around romance, emotional and physical connection. In real life I appear as a cold blooded rationalist with only limited capacity for feeling. I don't much connect with people physically or on an emotional level in real life. I wish I could. In my fantasy life I do.