Final answer:
Self-serving leaders often demonstrate authoritarian behavior with a focus on personal ambitions, while servant leaders engage in socialized charismatic leadership that promotes group interests and empowerment.
Step-by-step explanation:
The distinct patterns of behavior separating self-serving leaders from servant leaders generally come down to their approach to leadership function, leadership style, and how they interact with their followers. Self-serving leaders often exemplify authoritarian leadership, which involves issuing orders and assigning tasks, often driven by the personal ambitions of the leader rather than the collective interests of the group. On the other hand, servant leaders tend to engage in socialized charismatic leadership, which includes egalitarian behavior, a focus on the collective interests, and the development and empowerment of others. Democratic leadership and laissez-faire leadership are other distinct styles, with the former involving group participation in decision-making and the latter being a hands-off approach that allows individuals to self-manage.