1) The document discusses several theories of personality including traits, psychodynamic, and social learning theories. It also discusses types of personalities such as introverted vs extroverted.
2) Common personality characteristics and traits are discussed, including those identified by Cattell and Eysenck. Methods for measuring personality include structured tests and projective tests.
3) Individual differences in personality are important to consider because they can affect job performance, teamwork, training needs, and conflict. Understanding personality types and traits can help manage people effectively.