How do you determine good Tattoo Quality?

Props for being thorough! Good shading/coloring should have a smooth look. It shouldn't be choppy/you shouldn;t be able to see the individual strokes. It should have bright/highlighted areas and deep/shadow areas. A blow-out will look like ink spreading away from the outline under the skin.. would be really light but almost like a bruise. Also can look vieny. Also, look in his portfolio and check to see if he has healed pictures. That way you can make sure that when he puts a tattoo on the colors stay clear and bright and don't fall out. Good Question!