According to personalitytype.com, I am an INTJ (Introvert, Intuitive, Thinker, Judger) or an INTP (Introvert, Intuitive, Thinker, Perceiver) .

People of the INTJ type tend to be: autonomous, aloof, and intellectual; imaginative, innovative, and unique; critical, analytical, and logical; intellectually curious, driven to learn and increase their competence and knowledge; socially cautious and reserved; organized and definitive. The most important thing to INTJs is their independence and being able to live according to their own standards.

People of the INTP type tend to be: quiet, independent, and private; logical and unemotional; creative, ingenious, and innovative, global thinkers; curious and driven to increase their competence; casual, and adaptive; nonconforming and unpredictable. The most important thing to INTPs is their privacy and the opportunity to solve complex problems in unique ways.

But according to humanmetrics.com, I am an ENFJ (Extroverted, Intuitive, Feeling, Judging).

It says I am a slightly expressed extrovert, with a moderately expressed intuitive, a moderately expressed feeling, and a moderately expressed judging personality. A detailed analysis by Joe Butt can be found here.