1. Don't pick something just because.
2. It's impossible to tell if a tattoo is going to be good or crap without an image. The coolest idea can be a crap tattoo if created and/or drawn by a crappy artist.

"Oh, we are but soft and squishy bags of mortality rolling in a bin of sharp circumstance, leaking life until we collapse, flaccid, into our own despair." --"Fool" by Christopher Moore