In game communities I've managed there's always a strong desire from the people within the community to become a moderator for IMO the wrong incentives. (wrong being standing out and sometimes power)
I've tried to combat this but it seems very difficult. The thing that works best is to really hide the status and let people make their own ways of standing out.
I also very rarely gave moderator status to anyone who asked. It would mostly be people I see could be a good fit and also make sure there are no obligations to actually use power.