I have an MS in psychology, and I do much interviewing and assessing people for jobs. The Myers-Briggs is useful. It describes more your ways of interacting with the world around you, how you perceive. It is not the only personality "theory". I find that using both the 5 factor model and the Myers-Briggs gives a more complete understanding of a person and how they are likely to interact with other people and fit in to a particular position.