I love the variety of films. In theater, you go into a room and the director runs the room, so you all work to his or her method. On film, if an actor or an actress is in for a day or two, the director has to get out of that actor what they need, so they have to change and adapt to that actor's technique.
The general population still thinks HIV is something that came in the 80s and went away, or that it only affects the gay population or intravenous drug users.