I don't plan in terms of career ambitions. The only career ambition I have is to work with people who are going to bring you up and elevate your performance. They'll let you know things that you didn't know already and bring you places that you might not have gotten to otherwise.
When I started out at about 19, 20, it took me two years just to tell the difference between a jig and a reel. It does all sound the same, but what you can find once you go in - it's never-ending. So that's my love.
The good thing about my part in 'Harry Potter' was that I was pretty well disguised. When I was walking down the street, there was no real recognition factor. Parents would sometimes call their children to come say hello to Mad-Eye, and the kids wouldn't know what they were looking at.
I think every character actor at some stage likes to carry a film. It can be extremely liberating to just come in for a scene or two and do your thing. But I find it frustrating if I'm just doing little bits here and there for too long.
I started hitching about the country when I was 16 or 17 years old. I found the music that was played around the country - Irish music - had a particular resonance.
I loved teaching. And I always used to say that acting was just something I did purely on my own terms, and that if I had to make a living from it there would be too much pressure.
I don't maybe follow the normal star profile, and it's not something that I particularly want to embrace in terms of the publicity thing and wanting to be famous and known.
Actors will always tell you it's more fun playing bad guys. A lot of the time, it's criminals who are the people who don't care. There's something extraordinarily seductive about the guy who doesn't care, and to play that guy is terribly empowering, because you don't have to worry about the consequences of your actions.
The whole point of film for me is that it's such a joy. It's such a wonder. The possibilities are literally endless in terms of what you can creatively do.
My grandfather played a mandolin, so I got my hands on that. Then on down to a banjo, and I found I couldn't play any kind of soft or mournful music with that so I took up the fiddle in my late 20s or early 30s - and that was far too late. But it keeps me off the streets. It has been a love of mine since I was 17 maybe.
It's interesting going between small parts and then bigger roles where you carry the film. If the writing is good, and if the people involved have integrity, then you'll do it, even if it's only five minutes on screen.
I find myself really privileged to be able to go in and look at a set that the likes of Hollywood can provide, and say, 'My God, look at the craftsmanship in this; look at the ambition in it, the scale of it.'
I tend to look for the good in bad people and the bad in good people, to make them human. 'Cause I don't think that people generally are that black and white. Maybe in movie-land they can be... but that isn't necessarily all there is.
