I think as an actress, I prefer having a character on the page. It allows you to be more invested in actually creating a whole person. It's easier when you're not trying to come up with your next line on the spot.
“I tend not to trust people who live in very tidy houses. I know that on the surface there is nothing wrong with a person being well-ordered and disciplined. Nothing, except that it leaves the impression of that person having lived in the confines of a stark institution which, although he or she has ”
“I began to write a kind of waltz and in a little more than an hour I had the theme written.”