What is the fine-grained topic of the following text: The three personality drives in each triad/center have a shared “root” emotion/issue that each drive responds to and defends against either by over expression (2s, 5s, 8s), under expression (4s, 7s, 1s), or denied existence (3s, 6s, 9s). Only return the topic.
Personality drives in each triad/center and their emotional response mechanisms