There is no definitive answer to this question as it depends on personal preferences and the specific photo in question. However, some common finishes that can be used for photos include matte, glossy, and metallic. Matte is a non-reflective finish that is often used for portrait photos, while glossy is a shiny finish that can give photos a more vibrant look. Metallic is a shiny finish that can give photos a more luxurious look.