I'm always interested in trying to investigate different personalities. I want to keep myself guessing and keep the fear element alive, so that I don't get too comfortable.
I didn't need the insurance. I do it again if my DP tells me it didn't look good in the camera or if the actors didn't hit their marks. But if everything was working why do it again?
In art there are only fast or slow developments. Essentially it is a matter of evolution, not revolution.