I have considered recently getting these tattoos:
1) Barrel lad, somewhere. I don't know where, and would prefer it if someone else did it. I don't like being that kind of unique.
2) Kanji for "Crazy gaijin". I just think it would be really funny to have all these non-Japanese speakers thinking I'm all hip or whatever, while all the Japanese who read it assume I got the translation wrong in a bad way.
3) A full-facial
Moko. This would be awesome, and wouldn't affect job prospects that badly, as it's illegal to discriminate on basis of race here. Also, any job I want wouldn't give a shit, and I'd look freaking awesome. And I'd get it done the traditional way, for manliness purposes.
4) Angel wings on my back. I considered this for a while, but it would just be tacky, I think.
I think Apocralypse has the best tat on the fora, based on what I've seen.
5) Barrel lad again. I was just thinking about this over tea, and I think it's the best xkcd-tattoable-thing.