I know of several reputable, talented artists, so fortunately quality is not a problem. And I have a rule (more of a guideline, really) that no ink shall become part of me until I've considered it for a year. If, after that time, it seems like a good idea, then it's a go.
After all, I'm choosing to literally make the image a part of myself. To me, I'm invoking a specific kind of energy or trait—a very symbolic process. A pretty image isn't enough. It has to be meaningful. Of course, that's just my standard for myself. I'm all about the Underpants Rule. If your ideas are different, good on ya. Be the boss of your own underpants. That's just what I need to be happy with my tattoo-related choices.