Tattoo advice

[Killjoy]

im 15 and im getting a tattoo

Bad idea, most likely you're gonna regret it in a few years.

List of girls names that i liked

Terrible idea, do you want those names to forever haunt you? Bring up discussions with any future girls in your life, explain to them that when you were 15 you thought it would be awesome to have a name tattoo'd on you back?

My childhood initals

Makes the most sense from the list you provided, but then again - what would be the point of having those written on your back?

a bottle of tequilla or vodka

You're 15. Any drug or alcohol references will make you look like a complete attention-whore/poser.

i know some of those are stupid but most have significant value.

If you're getting a tattoo, make sure it has meaning to it. Don't get it just because it looks cool. Don't get it to impress anyone. It has to be special, a reminder for you of who you are, how you got to where you are now and where you're going.