One of the four classic temperaments, characterized by reflectiveness and caution. Persons with this temperament prefer to be alone, are more easily dejected, and have to struggle with overcoming their natural tendency toward pessimism.
I have been to mumerous workshops on these temperaments and can usually tell what the main personality of a person is upon meeting them.
How about the rest of you?
I forget what my Meyers Briggs letters were, however. LOL! (Probably because they are a little different than these.)