Today I did the MBTI test.(Myers-Briggs Type Indicator).It is the best known and most trusted personality test available today.The test is on:
http://www.humanmetrics.com/cgi-win/JTypes2.asp
My result is:

Your Type is
ENTJ
Extraverted Intuitive Thinking Judging
Strength of the preferences %
33 38 1 11

Qualitative analysis of your type formula
You are:
moderately expressed extravert
moderately expressed intuitive personality
slightly expressed thinking personality
slightly expressed judging personality

Most suitable careers:
Management in Business or Education
Military Education
Politics
Law
Counseling
Engineering
Industrial Management & Manufacturing Management
High School Education
Computer Programming

My father also did the test.
His result is:
Your Type is
ENTP
Extraverted Intuitive Thinking Perceiving
Strength of the preferences %
33 25 25 11

Qualitative analysis of your type formula
You are:
moderately expressed extravert
moderately expressed intuitive personality
moderately expressed thinking personality
slightly expressed perceiving personality

Most suitable careers:
Education
Engineering
Natural Science
Information System Specialist
Counseling
Management in Business or Education