I thought about getting a tattoo years ago. I even designed it myself, but then my harddrive crashed and I lost the design, because I wasn't yet in the habit of frequently backing up. Maybe that was a sign not to go through with it.
They say there's only one tattoo you won't regret, even when you're old and saggy and the ink looks rubbish. And that is your child's name, because they will be yours forever no matter what (and hopefully you die before they do). Woe to those who get their bf, gf, or spouse's name done. Mom or dad might be okay.
If I had to get a gaming tattoo -- I once wanted to get the Quake or Strogg symbol or something like that for some reason. Probably because I was into Quake a lot years ago, especially Quake 2.