I've gone 100% without soap/shampoo/face wash/deodorant/conditioner/any product/etc... for 3 months now and am very happy with the results. This is the first winter in which my skin hasn't started peeling off. Ironically my skin is softer and less dry after stopping moisturizer use. My armpits and private areas don't smell bad anymore after a long day. My face no longer progresses from dry/scaly to extra-oily over the course of a day. My hair doesn't get oily and gross anymore, it sort of stays in this perpetual slightly moist state that is easy to style.
If you haven't tried this you need to! My biggest concern was odor but that turned out to be a non-issue. If anything, I smell better now that the oil glands aren't working in overdrive.