An important aspect of any personality test is that they each have characteistics that exist on a spectrum. For example, the first letter of the MB results could be I or E, but there is a possible spectrum from 100% I to 100% E. A person is somewhere along that spectrum and gets the I or E depending on which side of the midpoint of that spectrum they fall.

Any test result should show where a person is along the various spectrums of values in the test model. Just how I or E is a person if that is the first letter of their MB result? The same would go for other such tests.

Seeing the spectrum position seems to me to be much more meaningful that a simple letter, or color, or acronym.