I got my first tattoo three or four days after my 18th birthday.

That is the runic symbol for Dagaz. Everywhere you look, it has a different meaning. But the common theme I see with this rune is "change", whether it be positive or simply salvaging something out of an otherwise negative situation. My ex use to read runes (much in the way some people read tarot cards). The way he read them, I had to "ask" the runes a question and a rune would be drawn for me to descifer for myself what the answer was suppose to mean. My ex was not in support of my transitioning, and I asked the runes about whether I should honour his wishes to stay physically female, or actually transition. That was the rune that was drawn. I took it as a sign, and that rune has a special meaning to me.
Other than that one that I have, I plan on having a bunch of zombie-themed tattoos. I want a bite mark, I want a tattoo on my ribs to make it look like my flesh had been torn off to reveal ribs, I want a tattoo around one of my calves to look like my leg had been sewn back on after being severed, and I want an old-school pin up girl who has been modified to look like a zombie.