- The Keirsey Website
This site has a ton of information, and can be a bit overwhelming at first; just read carefully, so you know what you're looking at. Mainly, it features two online tests that help describe your personality type: the Character Sorter, and the Temperment Sorter. (I found the Character Sorter a little easier to do; you may want to start there.) Your results will describe your personality type and subtype; you can follow links to read more in-depth descriptions of these. You can even get a list of names of famous people that match your personality type! - Jung Typology Test
A pared-down, no-registration-required test very similar to what you'll find on the Keirsey web site above. You might also like to read a brief summary of the theory. - Kingdomality
An unusual twist on the personality profile, Career Managment International's test gives you a profile based on types drawn from Medieval society/lore, such as the Minstrel, Black Knight, Discoverer, and Shepherd. Give it a try! - The Room
Un-scientific, surreal, slightly eerie, . . . and fun. A bit graphic-intensive, be sure you have a fairly good connection or a bit of patience. - Discover Your Archetype
"Learn about the way you view the world, how others see you, and how you can fight the forces that keep you from being the best you can be..." Um, OK...maybe a little melodramatic. The questions here are deliberately bizarre; just answer them! - 20 Questions to a Better Personality
"This is the personality test that leaves the rest behind. It does make judgment calls, and it does assess your role in society, so faint of heart beware." Um, sure. Give it a try, anyway. From the oddly-named Jenny Turpish Slapped Me web site. - Tests, Tests, Tests...
If the tests above just aren't enough, jump to this site and give yourself a whole battery of personality, intelligence, and lifestyle tests. There's also a large section of links to other tests on the WWW, if you find yourself becoming a test-a-holic. (Hmm. . . I wonder if there's a test for that?)