Back when I was anti-Christian, I used to throw scriptures at Christians with tattoos like:
Ye shall not make any cuttings in your flesh for the dead, nor print any marks upon you: I [am] the LORD. Leviticus 19:28
"Do you not know that your body is a temple of the Holy Spirit, who is in you, whom you have received from God? You are not your own; 20 you were bought at a price. Therefore honor God with your body," (1 Cor. 6:19-20).
One response I found funny was "Yea my body is a temple of the Holy Spirit, and these tattoos are the stained glass windows!" To which I replied, "Yea and this cigarette I'm smoking is the incense?"
Now that I'm older, and looking beyond the triviality of it all, I truly doubt that God cares if, with good intention, we get a tattoo.