"Personality psychology is a branch of psychology which studies personality and individual difference processes - that which makes us into a person. A large part of the work of personality psychologists has been defining what is, and what is not, personality. A scientific consensus has not been achieved."
Personality psychology , Personality, Trait theory
Personality Theories - covers all the major theories in modern psychology
Theories of Personality - covers a huge range of personality typologies
Great Ideas in Personality
"How do people tend to think, feel, and behave--and what causes these tendencies? These are the questions addressed by personality theory and research. This website deals with scientific research programs in personality psychology. They are offered as candidates for the title "great ideas"; whether they are indeed great remains an open question."
Includes overview and comparison (with tables) of different theories of personality
The Personality Project "A guide to the academic research literature in personality and personality theory. Meant for those with a serious interest in current personality theory and research."
Personality Theory and Assessment short page of links to different Personality Theory and Personality Assessment pages