Black and grey is a tattoo style both iconic and classic. Over the centuries it took many forms, spanning from the adornments of tribal groups, to the Chicano style of the latin community, the dotwork inspired by oriental art and sacred geometry, versions of American and Japanese traditional, all the way to various modern interpretations of blackwork. Regardless of the specific style, the strength of this monochromatic choice is good understanding of Value and Composition, to craft a tattoo that is both readable and ages well.
According to your own personality and what resonates more with you in terms of aesthetics, a good artist will be able to translate your idea in a tattoo that works, independently of it being in color or black and grey. As an old tattooer once said: “It’s the black that does all the work, the color just adds the magic”.