I don't have any tattoos myself. I've thought about getting one, but I can never come up with anything that I'd want permanently on my body for the rest of my life. Some people just say "the hell with it" and find something they really love and just go for it.
Here are a few Star Trek tattoos for you to look through, one of which features Jason Criss's USS Enterprise NCC-1701-D knuckle tattoos. Here's what he had to say about it,
It took me a while to figure out what kind of Star Trek tattoo I wanted to get. I finally decided that the enterprise d on my knuckles was the best choice for me. It’s still a work in progress there will be more shading and colors after the initial outline heals.
Check out the rest of the Star Trek tattoos below. I'm sure many of these make good conversation starters.