Some defining traits of Winston Churchill's leadership style include his exceptional oratory skills, charisma, and steadfast determination. His ability to inspire resilience during World War II was evident in his speeches, which rallied the British people against Nazi Germany. Churchill's leadership was characterized by a hands-on approach and bold decision-making, often taking risks to achieve strategic goals. He advocated for strong alliances, particularly with the United States, and his famous saying, "Never give in," encapsulated his tenacity and resolve during tumultuous times.