What variations do you notice in specific types? Socionics has sub-types for whether someone shows a stronger development of their dominant or their auxiliary. However, for this thread I'm not necessarily looking for sub-types in this sense. Type manifests differently in individuals, but there does seem to be patterns. Much of this probably has to do with functional development, but other theories could explain further differences. For instance, many people use the Enneagram to further distinguish within type. What are your personal observations? Or what theories on this have you come across?