While Types A through D are the most researched and established models, some theorists have proposed additional types warranting further study, such as. Type E: Entrepreneurial risk takers with a bold vision yet flexible vision. Prone to thrive under pressure of new challenges and willing to learn from failures. Type F: Free spirited “floaters” valuing balance, spontaneity and lack of routine over structure. Often drawn to creative or outdoor fields that allow independence. Type G: Gregarious social butterflies who energize from interacting and connecting with many diverse people. Thrive in fast-paced social roles. Read more