[gridlockd]

You're conflating the time you can use for work and the time you must use for leisure. I have about 5 very productive hours in the day, plus maybe another 5 less productive ones. I must replenish my energy in the remaining hours.

Now, if you like cooking, perhaps it is like leisure, perhaps it actually replenishes you. Otherwise, you might as well put a dollar value on it, because you are effectively working overtime.

Another way to look at it is that you're really using dollars as a way to better manage your time. Let's say you work 8 hours a day, but you put in another 2 hours into learning something new, maybe a side business, anything that isn't just leisure. Of course that doesn't translate directly into a salary, but the expected value is not zero dollars.