>That was it. The Myers-Briggs is the one where I refused to answer a few questions because they were completely out of my line.
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>Is this assesment in any wide use?

It was overused/misused by trendy corp training back in the '80s & early '90s -- it was part of a mythos mix at the time which asserted that training employees well, paying them well, having cafeterias and gyms would make them happy, creative and productive (i.e and therefore earn the company more money. Now it's all about outsourcing/off-shoring.) Such pop-psychology applications have earned it some critics.

Myers-Briggs proper place is when used as a quick assessment starting point for identifying an individual's personality. This is particularly handy for larger institutions. It's based in Jungian personality theories. Don't be afraid to select an answer from none you agree with. Even selecting the least agreeable is informative.