Theres a test in psychology called the Myers Briggs test, and it gives a lot of insight into your personality and who you are as a person. It's pretty tight, because it can even predict career paths and even hobbies/interests.
You can take the test here:
http://www.humanmetrics.com/cgi-win/JTypes2.aspI basically got the best score possible on mine. Only 1% of the population gets this score; it's the score of lawyers and scientists, as well as amazing historical figures light Dwight D. Eisenhower and Ayn Rand.
Introverted: 1% Intuitive: 100% Thinking: 77% Judging: 44%
http://en.wikipedia.org/wiki/INTJTwo things that are important are the letters, and the percentages. For example, you'll notice that for my score I got a "I" for introverted. This is opposed to getting an "E" for extroverted. Multiple letters are possible for certain traits. The other thing that is important is the percentage of a particular trait you get. Beside my "I" for example, I only got 1%. This means I am only very slightly introverted. This is opposed to the very high score I got next to my "N" -- I am 100% intuitive, so I am fully predisposition ed to that side of the personality spectrum. Traits where the percentage is higher indicate a higher predisposition basically.