Just a big old yes on this for me. I'm not sure how to make it happen, but I feel like this avenue of character expression brings a plethora of uses and ideas to mind. In addition to the above mentioned cosmetic, and self-aggrandizing reasons, there are ideas like camoflauge patterns for flat out sneaks and contouring for subtle disguises, or to aid some 'appear' choices. All with a little personal flair? As well as the RP we all can't wait for.. Your friend falling asleep with their shoes on at your place, and you drawing a vaguely phallic shaped object on their forehead and signing your masterpiece. Only for them to be told about it by someone much later in the day. While you hold a straight face. Or is that just me…?