A blind spot
I am, depending on perspective, either blessed or cursed with an impressively large metabolism; at various points in my life I've averaged about 5000 calories a day, with a stable weight, a slim build, and low cholesterol. My major complaint about American restaurants is that the portions are so small; with a few exceptions (the Cheesecake Factory serves portions that are precisely the right size), I leave restaurants still hungry unless I've done something silly like order two meals. (Or bring a date; my last girlfriend and I averaged two meals between the two of us).
Consequently, whenever I read a comment like Michael Pollan's "Eat food. Not too much. Mostly plants," my immediate reaction is something like, "there's just no way to get a full meal out of plants. It's almost impossible to feel full after a meal with less than half a pound of meat in it." And for me, that's more or less true. But I should stop projecting onto the other 99% of the country.