I took a "leadership" course at work recently and it was all based on Meyers-Briggs and learning what your personality type is and how to deal with other personality types. The Meyers-Briggs test and the whole "ecology" around it seems to me a way for some subset of the business training industry to make a buck.

See http://en.wikipedia.org/wiki/Myers-Briggs_Type_Indicator#Cri... for criticism of Meyers-Briggs.