PERSONALITY ASSESSMENT IN STARTUPS IS VITAL. The one thing that can blow up a startup quicker than anything else is character, either of the key founders, or of the investors or board. Why this is overlooked by so many people dazzles me, and I see examples of this blind spot every week. Remember that about 1%, or more of us are psychopaths, borderlines, severe narcissists, and the less severe forms are way more common. These personalities are often charismatic and brilliant. You need to take this really seriously in your due diligence.
http://commercialbiotechnology.com/article/view/305