People want black and white answers, but it's not one thing or another. I think the only way we're going to make good things is to inspire people and make them feel as though what they're watching is real.

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.

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.

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.

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.

I don't make 'issue' films. I like making films about rebels or pioneers or people that are doing something.

I watch mainly fiction. The films I like watching are films where you see people change, like with Boyhood. You see a moment in someone's life where it's a breakthrough. For me, the breakthrough in Boyhood is that amazing moment right at the end when he finds somebody he can feel relaxed with, and who will maybe be a friend for the rest of his life. I like that it doesn't end in a love affair or marriage. It just ends in, "Wow, I found people I can relate to for the first people in my life. These people accept me, I like them."