Eating by the seasons is also pretty interesting, I think. It forces you to expand your gastronomic horizons, explore the cuisine of different regional cultures. Some cultures don't use milk (and thus cheese or butter), some don't use much oil, some are vegetarian while some are nearly all meat. There's preservation by fermentation, by drying, by salting, by burying, by sealing in hardened butter. Some just eat a lot of soup. There's really an infinite number of dishes that express flavor, aroma and texture. If you ever get bored of your food, you can fix that.