His work often features religious scenes with a focus on human emotion and theological clarity. In pieces like the Death of Saint Jerome, Passeri uses contrasts and detailed figure compositions to convey a sense of solemnity. He frequently depicted the Rest on the Flight into Egypt, a subject that allowed him to balance domestic tenderness with religious gravity. His style avoids the excessive ornamentation of earlier Mannerism, preferring a more direct and legible approach to storytelling.

Modern collectors value Passeri for the technical precision of his line work and the historical weight of his subjects. His compositions provide a window into the spiritual atmosphere of sixteenth-century Italy. These prints work well in contemporary interiors because they offer a sense of historical continuity without being overly decorative. The monochrome nature of his engravings allows them to fit into various colour schemes while maintaining a sophisticated, academic presence.