I'm a big mix between Aperture priority and Manual, with auto WB (I can change that at any time, shooting in RAW) and a set ISO. Most of the shots I take, I know what depth of field I want for the "look", so I set the appropriate aperture and ISO and see what happens with the shutter speed, then adjust ISO to get where I need. For night time, motion, long exposures, or intentional under/over exposure shots, I'm in manual all day long! I've only used Shutter priority a couple of times, and seem to prefer manual over that.