User blog comment:Sannse/Choosing the Right Admins/@comment-168424-20140823205811

Not really mentioned above that I can tell, but other good checks:
 * Are they an admin at another wiki? Do they have history as an admin of another wiki? If they do, their actions on the other wiki are a good reflection of how they will behave on yours. Also you can gauge how truly active they might be on your wiki based on the other wiki(s).
 * How much admin experience do they already have and when was it? More admin experience is usually better, but if their experience is from short bursts or from long ago, it may not be as valuable as long time recent experience.
 * Are they an admin at too many other wikis? Even if a candidate is good for other reasons, if they are stretched too thin, they may not serve your wiki well. Make sure to ask how much contribution a good admin candidate is planning to give toy your wiki compared to other involved wikis and try to make them stick to their prediction.