I've taken such tests before and I don't think they are a useful instrument for me. It's important to remember that every model of reality is just that, a model - people are always more complex, and there is no model that fits every person.

I also really dislike the names they have allocated to the different styles in the model. I strongly believe that none of the styles in the model is inherently good or bad, and so it is unnecessarily judgmental to use one positively loaded term and three negatively loaded ones, as if one style is better than the others. (But this is something I have argued before in other threads, and I know my view is a minority one.)