My fiancee is a tattoo artist, and we have both noticed the proliferation of bad tattoos in our area. People put out these tats with broken lines, aweful shading, and the customers do not seem to know if they are bad or not.
In the interest of improving tattooed life for everyone: if you are interested in using a cerain artist but not sure, feel free to PM me or post here with a link to their work. I can have Mark critique it for symmetry, line smoothness, etc. I myself never knew a good tattoo from a marginally bad one until I started researching and reading up on how to tattoo, etc. Just shooting this out there!