as far as i know, there are 4 temperaments (personality styles):
extrovertsanguine - friendly, jovial, not disciplined, cheerful, easily bored and angered,untidy
choleric - more serious and goal -oriented
introvertphlegmatic - cool- headed, reflective, neat and always in control of self
melancholic - deeply withdrawn, creative and artistic, deep thinker
u can read more about it on the internet:
http://en.wikipedia.org/wiki/Four_Temperaments