Would I have the permission to get this as a tattoo someday ? not now, in years maybe (money), but I really mean to do one of your pieces of art, and a pony in this style is what I would like.
Your Pinkie Pie one is the best one in this style, though Flutters is my fav pony. If a Twilight is done, I'll think about it too. Or a background character like Fleur de Lys... don't know, a pony in this style does sound great, but I wouldn't know which pony...
Anyway, that is, if I have your authorization to use your art as a base. Or as such.
Or maybe you'd like it more if I commissionned my tattoo to you.
Either way, I'll stick to your choice, you're the artist.