This is also my point of view. It is not so much about the game itself than about the friendship it has fostered and the many memories it has created during my youth years.
We also specifically want minimalistic tattoos that people who haven't played WoW will not recognize as being from a video game.
This is an example of a tattoo I like a lot:
http://i.imgur.com/xvlxg.jpg
While people who have played WoW will directly recognize the Kirin Tor logo, it could well be some egyptian artwork.
In 40 years time, when the game does not exist anymore, I will tell my grandchildren how I used to play this game back when [insert insane technology here] wasn't a thing yet and had loads of fun with my -hopefully- then still best mates.
They either think I'm awesome or they will be embarrassed. I am cool either way.