Regarding your worst types you'll ever meet comment about glamorous industries. The glamour is the hype driven misperception of those on the outside that those on the inside know is false. I've worked in the yachting (doing photography, brochures, ads), tourism (same services as yachtbuilder clients), real estate (in Riga), investments (channel check research for hedge funds), angel investor and startup advisory for shares. In all most bad behaviour was due more to disorganisation and incompetence than predatory intent. All business is a pressure filled slog like herding cats. In my experience success depends more on trust, teamwork and reciprocity more than predation. But my experience could be sampling error since my corporate experience is nil.