I'd only give admin access to a person if it's absolutely necessary for the site.
Example: if administrating the said site requires too much work, and I have someone I could trust completely with it.
About staff, don't pick your friends. Pick only members who have been very active, mature, and contributing to the site, as they're more inspired/motivated to do the work, and actually care for the community, and all the work they've invested in the community makes them a part of it. Your outsider friends will probably be there for the title only, and lose motivation quickly.
Example: if administrating the said site requires too much work, and I have someone I could trust completely with it.
About staff, don't pick your friends. Pick only members who have been very active, mature, and contributing to the site, as they're more inspired/motivated to do the work, and actually care for the community, and all the work they've invested in the community makes them a part of it. Your outsider friends will probably be there for the title only, and lose motivation quickly.