Except when it comes to food. Growing your own food and cooking it yields far better quality than what you can buy in stores or restaurants. Yes there is time involved, but with practice, your time is recouped in such a way that you're enjoying dishes on a similar level of taste as what you'd pay over $100 a head in a high-end restaurant. And you get to do that multiple times a week.
This holds even for food you don't grow but still cook (for me: meats). The downside of course is that now it is very hard to enjoy food in a restaurant unless it's high-end or in an ethnic specialty I don't master. (raises pinky finger :) )