the Obstacle Character's preferred method of general problem solving
By temperament, Obstacle Characters (like each of us) have a preferential method of approaching problems. Some would rather work things out externally, others would rather work things out internally. There is nothing intrinsically right or wrong with either approach, yet it does affect how one will respond to problems. Choosing "Do-er" or "Be-er" does not prevent an Obstacle Character from using either approach, but merely defines the way he is likely to first approach a problem, using the other method only if the first one fails.