My conception of it was that in a normal film you have a story with different movements that program, develop, go a little bit off the trunk, come back, and end.

For me now, it's about what you would write and what you wouldn't write, and that's how I select what I am going to do. It can be quite nice being brought a concept by a studio for me to work on.

There's no point in making a film out of a great book. The book's already great. What's the point?

I don't think we have enough imaginary creatures in cinema. It seems like we're stuck with zombies, vampires, and werewolves. We should have everything. We should have minotaurs. We should have elves. We should have mermen in popular culture. But instead we've stuck with vampires.

When you've written a movie, you then get together with a whole lot of people and make it. In many ways, I think it is far nicer to be with people rather than being completely solitary.

I just got back from New York, and I realized in New York, it's very difficult to hear a New York accent. It's almost impossible, actually - everybody seems to speak like they're from the Valley or something. When I grew up, you could tell what street in Dublin someone's from by the way they talked.

Never make a promise - you may have to keep it.