The No Child Left Behind Act requires that all teachers in core academic subjects to be "highly qualified" by the end of the 2005-06 school year. New teacher leave the profession at an alarming rate--research indicates that 50% have left within five years of their first job. This article explores the personality types of pre-service teachers and non-education majors. The authors suggest that more appropriate screening procedures should be used by teacher preparation programs. Personality types may relate to teacher success and length of service. This article features several studies of pre-service teachers' personality preference profiles.