I ate quite a few TV dinners (mostly the old Swanson ones, I think) in high school and college (back when they were still in the aluminum foil trays). They weren’t bad, though it was always frustrating that the rest of the meal would be hot after the designated cooking time, but the mashed potatoes would still, amazingly, be ice cold.
I also used to buy En-Cor frozen entrees, when my wife was out of town. I could get two or three solo meals out of those.
Also, this thread really needs to include this classic music video: