It always depends on a vision of an artist. They are both nice in it's own, but the general rule is that you are supposed to remove any temporary imperfections. From a commercial point of view client would be unsatisfied with a non retouched image 99.9% of the time. But i totally see your point and some of my images are very raw in it's nature. Especially when i am doing street photography or similar.
RE: Monomad Photography Challenge - Skin - most challenging type of retouching.