Oh oh, body modification is my love.
I actually think it would make a really cool career, to to tattoos and piercings and such. Unfortunately I'm no good at drawing, and I'm not entirely sure I could pierce someone.
I have no tattoos yet; my mother is making me wait until I'm 18. It's a little bit frustrating, but it gives me a little longer to think about the designs I want.
For the past few years, I have wanted an outline of a heart on my inner wrist, and a sniper-heart (heart in the middle of crosshairs, Kill Hannah's logo) somewhere I have not decided yet. Both of these are band related, which I know is not suggested. But neither are names, and they mean something more than just a band to me anyway, so I'm pretty sure I'll still end up getting them.
Piercings, however, I am getting before I am 18.
Right now I just have a lip piercing:

I started out with snakebites, but the place I got them done wasn't a very good one and they were really uneven, so I took the right side out. I'm getting it re-pierced sometime over the summer.
Other piercings I really want are septum, industrial, eyebrow, and traiga. I'll probably have to wait until 18 for the septum, since my mom really really really hates nose piercings.
I also have two scarifications, the closest things to tattoos I could do myself. I heartagram on the back of my wrist and a sniperheart on my hip. There are pictures of them somewhere on the net, but I'm too lazy to find them right now. I think they're pretty cool, though a lot of people find them creepy...I don't see much difference between scarification and tattooing, except ink.
But yeah...piercings, tattoos, etc...it's an addiction, I think. Once you get one, you can think of 49857435 more that you would like to have.