I HATEHATEHATE them. They don't do what I want, impose their own priorities, and make it impossible for me to tell them (quickly, or at all) what *I* want to do. When I hit the shutter button, that's not a suggestion; I want the shutter to trip at that exact moment, not dick around trying to focus on what it thinks I want. I know what I want; I often shoot in "M" mode on DSLRs, and I can judge exposure by the "sunny 16" rule -- if it's sunny, the exposure is f 16 at 1/ISO speed.
If they had a camera phone which let me set ISO, f stop and shutter speed easily, and allowed for easy manual focus and *instant* shutter release, I might feel differently.