Who has paid for these studies? They have a distinctly corporate/HR air to them (as does the OCEAN personality trait model).

http://en.wikipedia.org/wiki/Big_Five_personality_traits#cit...

UPDATE: The OCEAN personality model was created by two guys working in the personnel dept. of an Air Force Base in 1961. So, take this with a grain of salt -- this model is optimized to rate folks working together in a miliary organization.