What should the ref librarian do?

So if you're a person walking up to the ref desk, what would you rather see the ref librarian doing?

1) Reading a book.  (Well, it is a library after all!  And since I'm now reviewing for Booklist, I have galleys to read.)

2) Writing on a piece of paper or typing on a keyboard.

3) Staring intently at a computer screen.

Since I'll be working five hour shifts this summer, I'm just wondering what activity would put students more at ease when they approach the ref desk.  Staring off into space and surveying the room don't really work well.