Bertram Wooster is characterized by his intense and sudden passions, which take hold of him strongly. When he is driven by these enthusiasms, he transforms into a focused and relentless force, showing a single-minded dedication to whatever he pursues. His friends and acquaintances recognize this aspect of his personality and understand how it influences his actions.

This portrayal highlights the dichotomy of Wooster's character, suggesting that while he is often seen as wealthy and carefree, there is a depth to him that emerges through his fervent interests. His ability to become wholly absorbed in a task allows him to be both entertaining and dynamic, making him a compelling figure in Wodehouse's storytelling.