<p>I think these types of tests are useful in self-analyzing one's personal style, with pluses & minuses relative to various types of management, but certainly not as predictors of business success or otherwise. Executive leadership training often has a Meyers-Briggs component, if for no other reason than to do some introspection, and to figure out a good route for success given a certain personality and career/job challenge or aspiration. I have seen successful business people with every kind of MB profile, but undoubtedly, there are MB types that "typically" do better with certain roles under certain conditions that other MB types. Plenty of opportunity for all MB types though IMHO.</p>