What word best describes dynamic enthusiasm and style in performance?

The term that best describes dynamic enthusiasm and style in performance is "élan." This word captures a sense of energy, flair, and vigorous enthusiasm that is often associated with both an engaging performance and a lively disposition. It suggests a spirited quality that reflects not only confidence but also a certain stylishness in how one presents themselves or their work.

While other words like "elegance," "chic," and "grace" convey notions of beauty, poise, and refinement, they do not quite encapsulate the element of dynamic enthusiasm that "élan" emphasizes. Elegance and grace often refer to a more subdued or traditional form of beauty, while chic relates to stylishness often tied to fashion. In contrast, "élan" embodies the vibrancy and passion that is integral to an animated and charismatic performance.