Anyways, I've always thought of Kanji writing as my younger brother has on the back of his neck but I've also of course thought of full anime tattoos. With the blessing of my fiancee, I'd most likely get a moe version of FFVII's Tifa Lockhart and even K-On!'s Mio wouldn't be bad if the tat is done right.
As I continue to ponder what to add, here's some interesting tattoos I found in a quick browse on the internets. Oh, and the title picture above is from yesterday's Anime Pic of the Day, can't get enough of that work by Muuten.