The artist used a precise technique that balanced formal portraiture with narrative storytelling. In works like Portret van Alexander Farnese or his studies of unknown men, he demonstrated a mastery of character expression. He often placed his subjects in domestic or architectural settings, such as Binnenplaats van een Vlaamse herberg. His compositions rely on careful placement of figures to create a sense of drama. The use of colour and shadow in his biblical scenes, such as Saul bij de heks van Endor, creates a somber mood without relying on exaggerated effects.

Modern collectors value the narrative quality of Hamman's prints. His depictions of historical scenes feel like snapshots from a play. The costumes and settings are rendered with historical accuracy that provides a window into the nineteenth-century view of the past. These works fit well in traditional interiors or studies. They offer a sense of historical weight through their subject matter. The balance of realism and romanticism makes his art accessible to those who appreciate classical European styles.