Leadership styles can be categorized into several types based on the leader's focus and approach. The most common styles discussed in the document are autocratic, democratic, laissez-faire, transformational, bureaucratic, charismatic, relations-oriented, and task-oriented. Effective leadership requires adapting one's style to the specific situation. Most top executives tend to have pioneer or driver styles, so leadership teams should be aware of potential groupthink from overrepresentation of these vocal styles.