I almost got a tat when I was in the service. Of course, I was drunk at the time but I'm glad I didn't. Most of my buddies that did get tats wish now they hadn't. What's neat when you're young can be downright embarrassing when you get older. Tats on the knuckles are kind of a jailhouse mark around here so I'd avoid doing that. Besides, when you go looking for a job blatant tats can get you shown the door pretty fast. Employers don't care what you think is cool, they care about company image.
Mike