Throughout my 20s (in my 30s now) I worked as a film composer in Hollywood, land of personal assistants. One thing I took to heart was that the best personal assistants weren't looking to use the opportunity get elsewhere. What you want is someone who wants to stay in that role, because as a lot of other comments here point out, it takes a lot of time for the person to learn enough about you to become truly useful ra…
Anyway... Just wanted to let you know that you made me really curious :)