Kevin, In my research efforts I have developed an assessment for identifying the three dominant intelligences of an individual. This assessment is based upon a data base of 50,000 assessment takers. In analyzing this data I have found what you have stated. Personalities and personal intelligences play a big part of career selection. This is why it is easier to develop instructional deliveries based upon student learning preferences because for the most part the students have selected their careers based upon their personalities and they don't even know it. Gary Dr. Gary Meers