One of the reasons I love self portraits is that I can experiment with all different kinds of post processing techniques and not have to worry about the images being perfect. This image was a focus error (eyes are out of focus), so I used it to practice applying landscape/travel retouching techniques on skin. Occasionally I use my landscape Black & White filters to highlight skin imperfections when I retouch.
My usual post processing is not particularly flattering for skin, which is usually why I avoid photographing models. I love hard details (part of my travel photography style) and desaturated contrast (personal preference), so applying these styles on myself is good practice, since I have photographically difficult/annoying features to retouch, like deep pores, scars, and stubble.