I actually have (or am about to have, as of 5 PM EST today) two tats on my body. One is a bulldog on my right bicep and one is a customized superman symbol on my left shoulder blade. BatchFile is right when he says it is up to the individual person as to what you should get. Get something that embodies you, and something you'll like to see for the rest of your life. Personally, I chose the tattoos that have some sort of personal signifigance to me, not something that just looked cool.
I'd hate to make a suggestion to you, but I have seen quite a few geeks with ink have a barcode tattooed somewhere on their body. Hex is always good, cause you'll havea giant binary tattoo if you want to encode something significant in it...
Regards,
Wizeman
