There are a lot of things to consider when you're looking for a tattooist. I've put together a list of important issues for when you're looking for a good tattooist in your area.
Tattoos are stories in and of themselves.
Check out the shop. Look at the portfolios. All artists in a shop setting have at least one portfolio book for everyone to look at. These are books filled with photographs of finished pieces. A good artist will be more than happy to talk with you.