The magic of documentary is that I keep being surprised and amazed by the things I film.

I'm not generalizing anymore about men and women, because I think these old terms of "masculine" and "feminine" are going very fast with the rise of transgender rights that are questioning what all these categories are.

It makes it very easy. I have a beginning, middle, and end, and I don't film for long - about 20 hours usually for a two-hour film - so it's easily watchable in a week for me and the editor. Once I know who the characters are, I only film those characters, unless somebody else forces their way into the film by a scene happening to them or we meet them by chance.

The biggest misconception about me is perhaps that I film all the time and film everything randomly. The truth is I film very little and always when something excites me and seems to mean something for the film.

There's no point in making something if you're not falling in love with the people you're filming and you want them to really enjoy you being around. It would be weird if, when you're making a film, you don't think it's going to be the best ever or the worst ever - I guess it goes from one feeling to another.

It's always scary making a film as I never set anything up or ask anyone to do anything, so I worry that we'll find a story. I have to trust that a film will come out of the journey we embark on. I have many, many sleepless nights.

Those are the films I want to make. I don't want to make a film about, "Oh, those poor prostitutes!" Or "Oh, isn't it terrible in Chicago!" I want to make a film where people think, "Brenda's like me!"