Tats are fine I guess, if you like them. I don't care either way, but some people have had some pretty stupid looking tats. Plus, as Number3 mentioned, be careful where you put them, such as visible places. Landing a decent paying job may hang in the balance because of it. Believe what you will, but it DOES make a difference sometimes.
The old neighbor lady that lived down the road when I was growing up had one the Nazis gave her in a concentration camp. I'm guessing they didn't have a pattern since it was pretty haphazard. It TRULY meant something to her. She said that's why she never erased it, so that when her memory went, it would always remind her. Ever since I saw that, I've had absolutely NO interest in ink anywhere on me.
Besides, if I ever end up having to rob someone just to get by once this economy crashes, I don't want a tat to ID me and land my butt in jail. (Ever see the movie "The Town"? )