The day I let my camera choose my aperture for me, is the day the machines have won. If you use automatic aperture, get a grip and be a real photographer. Exposure is vital to the outcome of the image, and a safe 'proper exposure' isn't always the right exposure. In fact, I find myself under-exposing all the time. I feel the art of photography collapsing all around me; I wish I lived 40 years ago.