I go with ethnicity as a safer indicator. Ethnicity not being race, but subraces that have distinctive cultures, in this case. Most people (especially Americans -- North and South, not just US) are of mixed ethnicity, even if not mixed-race, in which case you lean toward the one you physically resemble the most, as dominant heritage that shows externally is probably dominating your internals too.
I'm a Germanic-British girl with Baltic-Slavic heritage, which is more dominant than the Germanic part and some rather obvious Scottish too. So, like the Scottish and the Baltics' traditional diets, I lean very heavily toward fat, don't fuss about salt, eat plenty of offal, eat my tubers, make myself drink lotsa water, don't fuss about the cold and eat plenty of fermented food. This wasn't actually all planned, believe it or not. I started eating that way because it felt right and then discovered it's the traditional diet of "my people".
I think most people would be better off just eating what they feel like, though (bar processed crap, which needs to be restricted if not eliminated from EVERY diet). Most people will lean toward the sort of macros their ethnicity has eaten for centuries anyway, without having to force themselves. And those that don't are probably the exceptions that are better off NOT leaning toward that diet. Everybody wins when you just eat what makes you healthy and happy, without worrying.
Perfection is entirely individual. Any philosophy or pursuit that encourages individuality has merit in that it frees people. Any that encourages shackles only has merit in that it shows you how wrong and desperate the human mind can get in its pursuit of truth.
I get blunter and more narcissistic by the day.
I'd apologize, but...
Ayurveda 101: The Three Doshas- Vata, Pitta, Kapha
^Site that illustrates the "three" body types, according to Ayruvedic medicine... Which is 5000 years old. I think it's interesting that a very similar theory was developed in the West in 1954. Maybe Sheldon knew about Traditional Indian Medicine...
"I think the basic anti-aging diet is also the best diet for prevention and treatment of diabetes, scleroderma, and the various "connective tissue diseases." This would emphasize high protein, low unsaturated fats, low iron, and high antioxidant consumption, with a moderate or low starch consumption.
In practice, this means that a major part of the diet should be milk, cheese, eggs, shellfish, fruits and coconut oil, with vitamin E and salt as the safest supplements."
- Ray Peat