If I had to define what I think a staffer is, my perspective is this:
What staff think they are: Fellow community members who maintain a playspace that most of them would also like to partake in, but issues of being busy staff-side or difficulties surrounding being "staff-alts" tend to interfere. Games need game owners, and games need staff, so they open and maintain the theme park and keep the hobby alive. A small percentage have the time and code knowledge to do so, so they ultimately bite the bullet.
What players generally think of staff as: Custodians of the playspace, facilitators of character and job approvals, and overall responsible for maintaining the playspace in a way that allows them to have as few roadblocks as possible for whenever they want to utilize the service. Staff participation and enjoyment is generally considered secondary to the above, because staff chose to fill that role, and it's not the player's responsibility to facilitate anything unless they choose to.