I tend to eat three meals a day at more or less regular intervals. If I don’t, I get cranky- or weepy, which is worse. It runs in the family- and my brother is worse.
That sounds very similar to my day, with the exception that I also delay lunch as long as I can - usually until about 2:30 or 3:00 pm. If I eat lunch at a ‘normal’ time, I’m famished by 4:00.
My delaying tactics include eating a piece of fruit, usually a banana, at about 11:00am and a tub of yoghurt around 1:00pm.
Ever since I had my colon removed (33 years ago), I have found that I feel hungry much more often. Part of what causes a person to feel well-fed is having a full colon, and the nerve signals for “missing colon” are apparently identical to those for “empty colon.” My brain hollers and screams that it is starving to death, and I feel dreadful if I don’t get something to eat every two or three hours.
I do best if I eat small meals every couple of hours. I go from being not at all hungry to starving and shaking very quickly, and if I don’t eat as soon as I realize I feel hungry, the consequences for all who cross my path are very bad indeed.
When I was growing up, eating on a rigid 3-meals-a-day schedule was absolute misery.
I get irritable, clumsy, and “oops, things are grey when I stand up” when I don’t eat regularly. One of my bosses once told me to get that checked out, but, meh. Since I learned to keep something small in my bag, it’s not much of a problem.
I have to eat breakfast, almost always some kind of energy bar and 3-4 cups of coffee. Depending on when I work or go to class, that’s between 8:45 and 10 a.m. I have to eat lunch no later than 2.
If I work a morning shfit, I’ll often have to duck into the break room to wolf down a cereal bar, so I’ve always got one in my purse or locker. If I don’t have that late-morning snack, I often get grouchy, spaz out, and babble stupidly. That’s when I usually get the “Have you been fed?!” comments 
When I have classes, it’s a lot easier. There’s always something small (mini-wheats, cereal bar, piece of fruit) in my backpack to tide me over until I can get a meal. And unlike at work, where I can’t eat on the sales floor, none of my professors have ever cared if I quietly chow down during a lecture.
Dinner is whenever I get hungry, usually about 5-6 hours after lunch. I should be done eating after that, but… mmm, computer snacks… :smack:
It changes all the time. Yesterday I had a cup of coffee for breakfast (which is noon right now), never got around to eating and remembered to eat dinner when I felt a bit dizzy at 7pm. I had half a cup of soup and didn’t need anything for the rest of the day.
Today I had soup for breakfast and just now had some for dinner and was fine the whole time. Tomorrow I could do the same thing and crash so hard I can barely eat for the shaking and dizzyness.
It’s better during the school year when candy for dinner happens much less often.