His work is defined by narrative clarity and expressive gestures. In pieces like The Little Vauxhall and The High School Friends at the Promenade, he captures the fashion and social rituals of the eighteenth-century middle class. Wille used oil paint to create the precise textures found in his father's engravings. He avoided the soft-focus style of the Rococo. Instead, he preferred sharp outlines and clear lighting to define his figures and their surroundings.

Modern collectors value Wille for his observational detail and the candid nature of his subjects. His scenes of daily life offer a direct window into the costumes and social habits of his era. Works like Old Man Accosting a Young Woman display a sense of theatre that remains engaging in a contemporary setting. These prints provide a balance of historical accuracy and character-driven storytelling for a home gallery.