For those interested in the MBTI thing I usually have tested INTJ. I personally think though, that the test/retest reliability and general vagueness of the descriptions of the types makes then little mite to be taken seriously than a horoscope. But I guess that might be a typical opinion of someone with NTJ tendencies.
I am one of rather few people I know who has no tattoos. But I could probably know myself a lot better than I do, so I don't know if that counts.