The types of personality:
Type A: productive, overachieving and ambitious, usually marked out by physicality too, because of exercise and attention to health.
Nerd: More regular, lacks in some areas, but is superlative, even nigh perfect in a few areas. Glimmers of talent and flirtations with ambition.
Normal(O on x and y axis): A magical place, zero on the scale, in which one is not being pushed or pulled. I argue this is not our aim, which is usually type a, but a lack of cause for complaint, not being pushed by fatigue or beset by ambitions. Again, a magical place. Transitional. So many of us wish we were in this category without ever realizing that we have been there so often.
Sluggard: Unmotivated but partly functional. Unfocused and somewhat unhappy. Sedentary.
Reprobate: A catch-all for bad apples. No plan for tomorrow. Extremely unhappy, like the sluggard, and supplemented by illicit drugs, which often represents only clear path to happiness. Non-functional, even dangerous.