During the work week, I am definitely an "improviser." Get in the door, put something on the stove to start cooking, feed the cat, and then figure out what will go with whatever is on the stove.
When I am feeling particularly wiped out, I usually cook a pot of whole-grain rice, so that I'll have some time to unwind while it's getting done.
And I rarely consult recipes any more for weekday meals, unless it's something in the bready line (pancakes, biscuits, etc.) I have to admit that I have spent a lot of years "facing the stove" for my family, and I did use recipes when I started.
Of course, I do sort of generally plan my weekend shopping around "useful items" and I like to try new things, but I'm afraid I do a lot of inventing with what's at hand, whether it's a bit of red wine in the tomato soup, or shredded swiss cheese on the pasta.
One advantage is that supper is usually a unique experience!