Most of what I cook either comes out of a can or box, too. Even though I enjoy cooking, as does my wife, life is just too busy most of the time...
(Ramen is pretty much weekend lunch... not that good for us, I know, but it is fast and easy!)
I do go through phases where I will start tossing spices in everything, including the mostly pre-prepared stuff. But I don't know if that counts as cooking, or just "messing with it."
Well, it's better than doing nothing to it at all.
I'm guilty of doing that, myself. XD