When looking at my personality type, I have made up a few. One personality is the all or none personality, another I call the head in the sand personality and I have always considered myself a "literal" ever since the Amanda Show. I think perhaps these personalities are all a sub-strain of the perfectionist personality. Certainly there are negative ramifications of being a literal, like in the clip attached. For me I tend to do things people ask of me without thinking, perhaps to please people.