I cook for health, enjoyment and relaxation. I do strict paleo, which makes things pretty simple: omelette and bacon for breakfast, meat and vegetable for dinner, no lunch, but fruit and nuts as desired. If I'll be short on time to cook, I make a big batch of stew or curry and tupperware it.

Probably the biggest time burn is the "JIT food inventory", leading to a grocery run probably 4+ times per week. I've become too spoiled on fresh meat and fish. :)