I don't mean being a psychopath with one follower going on a killing spree on the whole wasteland with just the two of you, but what about a gang leader? You take over settlements, attack convoys, steal food, and it becomes more than just a gang? You'd have to fight Regulators and other vigilantes and other raider gangs. You lead your gang, not all the time on the front lines but also in planning? You recruit your lieutenants based on what skill they have, how vicious they are, etc. Once a while some raider will challenge you for leadership if you turn out to be a bad leader, etc.