Vanessa Amorosi had a pretty arm tattoo when she performed in Australia.
Some of the letter designs have bold lines and some are finely drawn. In some, all the lines making up the letters are the same widths. In others, line widths differ. Letterings without serifs look cleaner and more modern than letterings with them.
Choose an arm tattoo that matches your tastes and that will work well with your lettering design. If you want to desire to expose the arm tattoo, you can have a sleeveless dress.