I have to take control of situations when I'm at work; I have to make 'on the spot' decisions; I have to be responsible for other staff members.

I think Ozme52 has hit the nail on the head (certainly in my case) by saying that it's like taking a vacation. It really does make a change to have somebody else 'in control'...even though it may only be for a few hours.

By nature, I'm NOT a submissive person at all but sometime it's nice to have somebody else taking over and telling me what do do for a change.