On Personality Types and Sorts

Lately I've been really into analyzing why ppl act the way they do - the whole nature vs. nurture scenario. Are we born with a personality? Is our personality shaped by our surroundings? Like just about everyone else that has contemplated it, I’ll admit that we are who we are bc of both factors. I do think however, that a lot of what makes us individuals is from birth. I’m definitely into this whole Myers-Briggs Personality Typing business. It’s helped me a lot to understand where others are coming from and what motivates them outside of their experiences. Esp with ppl that I think have had similar experiences to my own, but seem to react in a completely different way.

Here is the shortest test I’ve ever seen on it.
http://bloginality.love-productions.com/index2.php

A more detailed test:
http://www.humanmetrics.com/cgi-win/JTypes2.asp

The definitive test (this only gives you a partial result for free, but if you save your answers and ez message me I can score it for you):
http://www.advisorteam.com/temperament_sorter/register.asp?partid=

Many companies also use this type of test in their human resources dept. I’ve been told it is great for career counseling. (It recommended I pursue a career as a social worker or minister. Funny, huh?)

I’m interested to hear what others think about this. Do you think it’s valid or helpful? Do you think it’s phony and a waste of time? Have you taken a test like this? What were your results?

BTW – I am ENFP. Here is a little about me:
Portrait of the Champion (eNFp)
Copyrighted © 1996-2004 Prometheus Nemesis Book Company.
The Champion Idealists are abstract in thought and speech, cooperative in accomplishing their aims, and informative and extraverted when relating with others. For Champions, nothing occurs which does not have some deep ethical significance, and this, coupled with their uncanny sense of the motivations of others, gives them a talent for seeing life as an exciting drama, pregnant with possibilities for both good and evil. This type is found in only about 3 percent of the general population, but they have great influence because of their extraordinary impact on others. Champions are inclined to go everywhere and look into everything that has to do with the advance of good and the retreat of evil in the world. They can't bear to miss out on what is going on around them; they must experience, first hand, all the significant social events that affect our lives. And then they are eager to relate the stories they've uncovered, hoping to disclose the "truth" of people and issues, and to advocate causes. This strong drive to unveil current events can make them tireless in conversing with others, like fountains that bubble and splash, spilling over their own words to get it all out.
Champions consider intense emotional experiences as being vital to a full life, although they can never quite shake the feeling that a part of themselves is split off, uninvolved in the experience. Thus, while they strive for emotional congruency, they often see themselves in some danger of losing touch with their real feelings, which Champions possess in a wide range and variety. In the same vein, Champions strive toward a kind of spontaneous personal authenticity, and this intention always to "be themselves" is usually communicated nonverbally to others, who find it quite attractive. All too often, however, Champions fall short in their efforts to be authentic, and they tend to heap coals of fire on themselves, berating themselves for the slightest self-conscious role-playing.