A good leader identifies and addresses the issues that are most important to the group they're trying to lead.
I haven't seen anyone on the ship yet who has done this--certainly none of the captains so far.
I have a feeling that Sean might be able to do this--I'd like to see him try.
Of course there's always the possibility that the crew would mutiny against anyone who really was a good leader. As we've seen on Survivor etc, being too good at doing something can get you the boot pretty fast too.
I guess amiable incompetence wins out over all.