I'm unbelievably picky about food. I will gag and be physically unable to swallow some foods, if they smell or feel a certain way. I basically have eaten the exact same few varieties of food for all my adult life, and in fact, the same exact breakfast item-for-item 365 days/year. But I am a fitness nut and a bodybuilder, so part of my eating habits is geared toward huge protein calories and no fats, and a hefty amount of grain to process all that protein.
Breakfast (7:40AM daily) :
4 egg whites scrambled with Tabasco sauce and black pepper (NO salt)
1/2 cup of plain oat meal with 1/4 cup raw walnuts and a tablespoon of honey and a dump of cinnamon
1/2 cup sugar-free apple sauce
2 or 3 cups coffee
I'm not kidding: I have not deviated from that breakfast in years & years! If I can't have those things, I get all befuddled and wind up not eating, which is BAD for the body. So I carry the oat meal with me, and if we're staying in a motel on a vacation, I have a small portable microwave oven and am fully equipped to make at least the oat meal and apple sauce and coffee, if I can't have the egg whites. Then I will go to McDonald's and get 3 or 4 eggs on the side, which are good-tasting, but have salt and cholesterol in them (unlike the filtered egg whites).
As far as stuff I cannot tolerate; any leafy greens are gag material. I know that sounds really bad coming from an athlete, but it's a fact. I eat alternatives to leafy greens (bell peppers, etc), and take vitamins (not as good, I know, but will suffice). When I was little, I was forced to eat leafy greens, and it made me vomit and I'd often inhale the vomit, and got pneumonia from it at least 3 times. No laughing matter.
Charles