The purpose of this research project was to investigate and compare the group personality preferences of the Air Force, Army, Coast Guard, Marine, Navy, and Civilian students comprising the ICAF Class of 1993. I could not include the Marine and Coast Guard in the group comparisons, because their group size was too small to draw significant conclusions. However, the report does include the information and descriptions of these two groups. My analysis identified three key points. First, the strong personality preferences of all the groups indicated a potential weakness in characteristics like flexibility,, creativity, adaptability, and concern for people. All the groups should guard against these weaknesses in their decisions and actions. Second, all the groups displayed a larger percentage of introverts than the general public, This could lead to misunderstanding and missed opportunity. The groups should ensure that extroverts and introverts have the opportunity to participate in group actions. Finally, my analysis identified a strong preference difference between the services and the civilian groups. This difference could lead to miscommunication and misunderstanding. When working together the Air Force, Army, Navy, and Civilian groups should take actions to ensure this does not occur. The report also recommends actions to guard against the potential weaknesses of their group preferences.