I bring a home-made lunch practically every single day. Even on those occasions where I'm going to be in a work meeting during the twelve o'clock hour and lunch will be provide for me, I still bring my own food from home just in case the catered lunch is something I wouldn't care to eat, such as pizza or anything with insufficient vegetables.
Today I have items from total ends of the spectrum. Cauliflower soup, from a "paleo" recipe cookbook. Creamed kohlrabi and dried apricot cake from my 1940s cookbook. Plus cocky-leeky-ricey soup, of my own creation. This is, to me, balanced because it contains a good source of protein, some whole-grain carbohydrates, and about 2 1/2 servings of vegetables. And I'm counting on it holding me through my workout this afternoon.
There's merit to be had in my 1940s cookbook of the standard American diet, even though I don't eat exclusively from the menus presented. There's also merit from the "paleo" cookbook, even though I'm not a "paleo" advocate. You can take the good from a variety of options and make it your own.
Last night I was watching "The Supersizers Go...Regency", and the episode made me a bit cranky. First up, when Giles goes to the doctor to discuss his diet for the upcoming week. The doctor has looked at the list of foods/meals and comments that Giles is going to consume ~5000 calories a day. How did he even come to that conclusion? Even if there is a list of all the dishes prepared for a single family meal, I think it's impossible that there are not leftovers. Looking ahead from the Regency into the Victorian era, the dictates of fashionable society resulted in a ludicrous number of dishes being served at a dinner party in order to cover the table in the correct manner. These would not be entirely consumed by a single group of diners, and there would typically be one or more additional dinner parties, with other guests, in the subsequent evenings in order to eat up the leftovers. Also, cookbooks of the day include many recipes of made-over dishes, designed to use up extra roast meat, potatoes, etc. Though I like "The Supersizers Go..." for their attempt at immersion into another time period, they quite often fail at real historical accuracy.