A tattoo portfolio is essential when starting a tattoo career, before any skin is touched, potential shops and tattoo masters need to see your skill level as well as your preferred themes and quality of your art. When building your tattoo portfolio, focus on drawing the types of art, themes and styles you are interested in tattooing. My favorite style is black and gray and the themes of my tattoo flash is always a skull or aztec mythology.  What are your favorite themes?