Seek to develop logical explanations for everything that interests them. Theoretical and abstract, interested more in ideas than in social interaction. Quiet, contained, flexible, and adaptable. Have unusual ability to focus in depth to solve problems in their area of interest. Skeptical, sometimes critical, always analytical.
According to Myers-Briggs theory, there are 16 types of personalities.
Don't know whether this test is authentic!
So I am an INTP, atleast thats what they say! By the way, Albert Einstein, Isaac Newton, Blaise Pascal were also INTP guys ;)