I don't pay much attention to tattoos - it seems like everybody these days is rocking some sort of artwork somewhere on their body (though, granted, some represent way, way more commitment than others).
What I do like are tattoos with words. I like to read what a person's chosen to express on their body. Often it is a date, or the name of a family member. But sometimes it's a quote. Those I love. Those tell me something about the person. I once spotted someone with most of To Be... tattooed up his arm.
So I find this article about literary tattoos pretty cool. Look at that Jack Kerouac example. Wow. The article is promoting a book on the subject, so apparently I'm not the only one who finds this particular method of self-expression fascinating.