Basically it is about preferred modes of expression and understanding and it is quite useful in understanding both self and others. The meta-cognition (thinking about one's thinking) around how you present and process in the world and how others do, is helpful in relationships - personal and business.
There are four basic quadrants and they are colour coded. Of course you can be a combination but you will always have a dominant or preferred default. And you will have one that you do not do well at all. When you have to deal with that quadrant be it a person who presents it or a circumstance, you will exhibit some form of avoidance or aggression - passive or active as a reaction.
Blue - realist/analyst Yellow - strategist/imaginer
Green - preserver/organizer Red - socialiser/empathizer
I found some real "AHA" moments during the interview - especially with my own pattern of avoidance with certain details. I mean I am an intelligent person - and usually can handle detail with ease in most areas but in one particular area - it was like I couldn't even read the details.
He explained the reaction really well and I feel much better knowing that it is a totally understandable reaction and that other people react in their own manner when confronted with their own particular brand of "kryptonite". All supermen and women, after all have their own weaknesses. The pdf that I found online was awesome and detailed how to shore up those areas that you are weak in. You can find it at http://www.Herrmansolutions.com