If you want to add uniqueness to your walls, I sincerely recommend paying attention to murals. It is especially impressive how they can harmonize with NYC architecture https://feelflow.space/pages/areas-served-murals-new-york-county - skyscrapers, historical buildings, modern interiors. Murals can not only decorate the space, but also emphasize its style and character. I myself was convinced that professional work of an artist enlivens the walls and makes the space memorable. Even in an office or a house with classical architecture, such an element turns the interior into a real work of art. If you are looking for a way to breathe life into the walls, I would advise you to try this approach.