Book excerpt: Gloria Moss reveals the extent to which design and advertising effectiveness can be improved through an understanding of the personalities of a range of stakeholders. While the impact of demographic factors (age, class, geographical location) is the object of considerable research, the impact of personality on production and preference aesthetics has been greatly overlooked. It is only by grouping together research conducted on diverse fields that a larger picture of the impact of personality on design production and preference aesthetics can be constructed.