There's just something satisfying about eating a sandwich on bread you've made yourself. Soft, delicious bread. A sense of accomplishment. Anyone can go to the store and buy bread, and sometimes even more cheaply than I can make it for (I don't want to think about how much I spent in molasses on my last pumpernickel).
It's funny, because not that long ago, it would have been completely commonplace to eat your own bread. We've become a society so dependent on having others do things for us.
I'm a woodworker, and there's a similar satisfaction to working with tools you've made yourself. Again, the craftsman of old would have scoffed at such an idea, having made 95% of his own tools. Today, you can buy tools just about anywhere for 1/2 of what it would cost you to make them.
But then cost isn't the point, is it?