So, there have been a number of wish list threads about being able to customize your character with tattoos but I've been thinking it would be real cool if your character could become a tattoo and piercing artist. I'm picturing some sort of design window where you could draw the tattoo. This would require player skill as well, of course, but there could be ways around it.
At lower levels you could start with a very small canvas for your design and a few templates (like flowers, arrows, etc.). As you level up the canvas can get bigger and the templates could expand, also, as you level up you could have more freedom as to where the tattoos can be applied successfully. They would allow any player to create their own tattoos by combining them, but also if the player wants to do something completely original, they could draw it as well. I'm thinking about a pixel by pixel or square by square sort of painting, rather than freehand tracing, so you sorta color in a grid of NxN squares.
As a tattoo artist you could charge to apply tattoos on other players and charge to sell your designs as templates for other players, and I picture this as a real way to make a living ingame as I'm sure many would like to get them.
Also, as you level up you could get the ability to edit or remove tattoos (which might be necessary).
I guess it might be a while before something like this can be implemented but unlike other artist skills (like drawing, painting, glassblowing), this one is not in the job skills tab so I thought it could be added to the to do (someday) list.