For sensitive skin I think Cetaphil Daily Facial Cleanser is great because it is NOT really a soap. It is a very lightweight cleansing product that takes off all the dirt and grime without stripping away the natural elements that you need to keep your skin soft and supple.
Many assume that your skin is clean when it squeaks after rinsing but if your skin is dry or sensitive you don't want to rinse away the natural oils that protect your face. You will notice that with Cetaphil, your face will just feel soft. It is also good for other things like shaving, (especially for sensitive skn) and make-up removal.