Just for fun, don't check all your exif files. What is your usual f/stop? Yes it varies with the subject matter and shooting goals. But if you had to use a camera with a fixed aperture, or if you had to guess what f/stop is set on your camera when you grab it out of the bag. Mine is f/2.8. If I can keep the BG out of focus I can make almost anything look a bit interesting. While I love f/1.4, sometimes it's too narrow.