There is something about ADD that many people don’t understand. Don’t try and screw over an intelligent person with ADD and think you will get away with it. You will become their “project” and they won’t quit until they prevail. Lots of very successful people, including some of the best trial lawyers have ADD.
Two of the most innovative, imaginative people I know have ADD. The “H” makes them very productive as well.
A monomaniacal streak can be something to behold, when properly directed. It’s not always a bad thing, and has been a very good thing, in many notable instances.