Kay, I want the same think, but Niņo of course. I'm getting it on my upper back in black and grey for my 18th b-day.
I would only ever get black and grey because I don't like the look of colors fading. (Anna, your colored pieces are stunning though)
I wanted Niņo's portrait on my foot, but I don't trust any person to capture him and his spirit properly, so I'll stick to designs. I do want more in the future, probably around my ankle and on my feet. I want a stylized version of the paw print marking Niņo has on his legs made out of spots. I also think I want soemthing that reminds me of a big cat, like a cougar or lionness. I also want a horse shoe on my butt.
For me, anything would have to be classy and carry lots of meaning. Something like that, like Niņo's paw print, I would always want to show, even at a fancy event in a strappy dress.