The quality of the leftover is directly proportional to the quality of the food when first served. I never regret having leftover turkey from Thanksgiving, or soups/sauces that can be frozen for future treats. Leftover steamed or roasted veggies find many uses. Oh, and no one seems to gripe about leftover pie or cake.
Leftover fish is a problem, though. It doesn’t seem to reheat well and really stinks up the microwave.
I have a friend who absolutely refuses to each anything that is being re-launched (reheated, submerged in a sauce, put onto a sandwich, chopped and added to pasta or soup, etc.). She calls all of it OLD FOOD and excludes it from her universe. Sad, huh?[:(]