For work today I took a personality assessment that uses a circular chart, divided into quarters. It is called the DiSC evaluation, and the results are either one or two letters from these: DiSC
So you can be a D or a DI or an I or an IS, etc...
And the closer to the outer edge of the circle you are, the more passionate about your prime characteristics you are.
I scored about 2/3rd of the way out from the center, and my letters are CD!
Deedee