One of the great things about the 'Iron Man' franchise is that they employ fascinating actors who don't necessarily do action movies. Before 'Iron Man' you didn't associate Robert Downey, Jr. and Gwyneth Paltrow with those kinds of films. There's an emphasis on repartee and wit.

I don't like talking about myself, if I'm honest.

Sometimes I can spend months doing things to make sure that my instincts work correctly, but ultimately it's still instinctive.

There are people all over the world who like to write fan letters in the voice of their pet: 'Hello, my name is Fifi and I'm a labrador and I think you're great. Paw paw!'

If you choose to do both [acting and directing] on a set, than you're admitting that you understand that everyone is in it for the same goal and it's a collaborative experience. You can't really jump into being an actor, and than direct yourself. At some point, you have to be willing to accept other people's opinions. I think that's helpful. If you try to micro-manage and control all of it, than you're probably heading for disaster.

I've played an awful lot of repressed people.

Sometimes you can incubate a character and that can take me a month just sitting on it imagining it, doing everything from sketching it to taking long walks, but sometimes you can see the character immediately. A lot of it is instinctive.