Quote from murray t turtle:
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There are personality blends for sure of the two types or four types, like Florence Littauer writes.
Littauer , she gives helpful nicknames like to type a;
Sanguine -''the talker''
Choleric-'' the worker''
Melancholy- ''the thinker''
Phlegmatic-'' the watcher''
It helps in understanding people;
even with personality blends one of those nicknames will usually predominate.
It's really part of the old classic temperament/personality classification, and a well-known system is the Myers-Briggs Type Indicator. There is an online temperament sorter, a questionaire, which calculates your type of personality, and even crossover mixes between types.
I remember I did one years ago, and got something like ENXJ - where the X was for T and F factors giving a mix of "field marshal"-type and "teacher" type. It was available from University of North Carolina - but got removed after some complaints from the Keirseys. Still the keirsey.com test seems to be exactly the same.
ENTJ - "field marshal" -
http://keirsey.com/personality/ntej.html
ENFJ - "teacher" -
http://keirsey.com/personality/nfej.html
It's actually quite cool beacuse a lot of famous personalitys are also classified. It really helps a lot reading up on the other types and seeing that they definitely are not part of your personality.
Try the test on
http://www.keirsey.com/ .
The test is available in English, Spanish, German, French, Portuguese, Norwegian, Swedish, Bosnian, Polish, Czech,
Danish, Russian, Finnish, Ukranian and Japanese.
The various temperaments are listed on
http://keirsey.com/matrix.html .
Also, the older descriptions (made from USENET alt.psychology.personality newsgroup discussions) from unc.edu is available at :
http://typelogic.com/ - the ENTJ trademark is expecially funny: "I'm really sorry you have to die."
The summary (from 1993) is available here :
http://www.ibiblio.org/pub/academic/psychology/alt.psychology.personality/FAQ.almost