I have one, and I have another one that I am almost ready to get. I have a two-year rule for myself. After I think of a tattoo and decide that I want it, I have to wait two years to actually get it.
The one I have is a strand of blue, Christmas lights around my ankle where only every other one is lit. This is a tribute to my favorite band The Weakerthans, my home town (which the song it's from reminds me of), and the impact others have had on my life.
The lines it's based on are
"You are a radio, you are an open door, I am a faulty string of blue Christmas lights
You swim through frequencies, you let that stranger in, while I'm blinking off and on and off again"
This is one of the most powerful lines that I think the band has, and is a sentiment I relate to. It's like, your only purpose is to be festive, attractive, and make people happy, but you can't even do that right sometimes while everyone else is just breath taking.
My upcoming one is a tribute to the webcomic A Softer World.