My idea is just to do something different each time; the next thing I do has to be completely different to the thing I've done before - that's what I try and do, because you know, I'm an actor, not a film star.

I come from a place where there's violence and inarticulacy. I worked in a pub from the age of 12 or 13. I used to see people smashing glasses over each other. I was never tough. I was scared of them.

I'm used to being in front of camera and knowing what to think. But if you're asking me to be me, I get very self-conscious. My job isn't to be me. Being an actor, people think you can do a eulogy at a funeral, a speech at a wedding. I find all that very nerve-racking.

I sometimes think if I had gone to Oxford or Cambridge and looked like a handsome young guy who could be in an Evelyn Waugh novel or something, I'd be a massive movie star. But there's a longevity to what I do. It's more reliable. Someone isn't deciding that I'm the next big thing.

I have friends who are leading men, and they're only ever allowed to play leading men of a certain type. But as a character actor, there's a wider variety of projects available. On the big Hollywood films, all they care about is having their lead in place, so it's actually easier for someone like me to slip in. And I'm happy to do so.

I'm the guy who plays human beings. I understand why the characters are doing what they're doing. When you play a villain, you don't play a villain: you play a human being doing what he thinks he needs to do to get what he wants.

It's a very fascinating thing for an actor to play somebody who is suffering, and you have to express the suffering, but in an inarticulate way and sometimes a dysfunctional way, through violence.