I'd have to get somthing that doesn't have an obvious link to the games (so I wouldn't, say, have the word ODDWOLD across my neck), though thankfully as somone above mentioned, Oddworld has attractive art and design which isn't specific to the games.
Saying that, though, a giant slig across my back does sound appealing...
Getting one of Abes tatoos tatooed seems like a bit of a cop-out, but maybe somthing like the
mudoken heads.
How about a Glukon on either butt cheek? Attractive?