Personally, I don’t understand tattoos. As much as I might be fascinated by Hannah Arendt at the moment, I think it would be a mistake to get a tattoo. The same is true for Kiribati.
It’s even true for Victoria’s Secret. All of that said, a tattoo can be good short form for an aspect of a character in fiction. It’s a device I am toying with at the moment in The Ark. One character is a video game addict. Another says little. And the last, ironically, overstates.