Look at how an artist specialises in the style that’s wanted.
Are they shaky and unsmooth to look at?
Have the lines blown out, making them blurred and spread?
Does the outline of the image look, as it should?
Importantly, circles. Is it round or has it been sat on?
Does previous work look even in its shading and blending?
Are the colours complimentary to one another?
Are the images in the tattoo of correct and flattering size against each other?
Are the tattoos themselves in correct proportion on the body?
When messaging is there a mutual respect?
Don’t expect a new best mate, just a friendly and understanding human.