I love the idea of getting the line from The Fault in Our Stars by John Green tattooed by a scorpio constellation or just a star map in general. "My thoughts are stars I cannot fathom into constellations.
Tattoo and tattoo artists have always been fond of dark imagery in their work. Naturally, skulls are one of the most popular tattoos. One of the things that is so awesome about skull tattoos is that there are so many.