On the surface, the theory sounds good, but if you follow the way the workbook is set up, you'll actually end up with cookie-cutter characters and shallow character arcs. I suppose, though, that is this way some counselor/therapists look at their clients - "You must fit one of these broad, overgeneralized stereotypes of human character; to fix it, now do overgeneralized, stereotype solution (A, B, C, etc.)."