I got one a few weeks back, it still isnt fully healed. It's a cat-paw (obviously). And I choosed that motif because im a sucker for felines. They make my life worth living. I also lost my oldest cat one year ago so it's sort of a little reminder of her. Had her for as long as I can remember, so it was a great loss.
I choosed that spot because the paw feels like a second hand for me.
Also, there's loads of old scars on that place, it feels nice to have something else to look at than old stupid memories.
So. For felines everywhere;

The picture is from when the tattoo was only 1 day old, so it's still scary and bumpy and all.
I'm planning on getting something with a branch, and some ivy as well, since ivy is my favourite... growing thing.
I also plan on getting a spell from Baldur's Gate, to show of my awesome geekiness.
Protection from Evil or something of that sort.

Or some of the higher level spells like Power Word Kill

(of course not with the whole scroll thing tattooed, just the symbol itself).