Tattoo artists have numerous job responsibilities and the actual job of applying tattoos is relatively small in comparison. Tattoo artists are responsible for keeping their store and station both clean and hygienic, insuring no contamination is possible. They must run an autoclave and other equipment properly to protect customers. They have to help run the business usually as well.
A good tattoo artist should be someone who listens to their clients. The main aim of a tattoo artist is to create and enhance tattoos as a body art. The only way they could make sure that it is perfect is by listening to what their clients want then move on from there. Only then a tattoo will be perfect.
A tattoo artist is someone who can produce amazing art under pressure. Unlike a painter a tattooist has to get it right first time whilst working on many different types of skin and often needing to use one hand to restrain the 'subject' from moving about and causing a mistake.