Personally, control freak that I am, I firmly adhere to the principle that the only setting for auto-anything is "off." I was shooting some video footage not too long ago and because it was grab-and-go stuff I foolishly left the autofocus on. The result was dizzying--the damn camera couldn't decide what to pull focus on, with the result that there was a constant slight rack-focus thing going on all the time. It rendered all the footage, except that in which the camera and the subject were static, useless. I know people who would have used it, but by my measure it was unusable. (I shoot film whenever I'm shooting motion, too, if I can afford to.)
A big part of photography is thinking about what you want to have in focus. That entails choices about lenses, exposure times, apertures and film speed that make the resultant images yours. For that reason I never use autoexposure either and I always meter off-camera.