It's difficult for me to talk about my work, or discuss it or analyse it afterwards. For example, after a shoot, I'd rather go and have drinks with friends. I move on – it's behind, it's done. People expect that I can get into deep discussions, but it's not obvious for me.

I find personal photographs of my daily life more difficult to shoot. When my first daughter was about to be born, I brought all the photo artillery to the hospital but I couldn't take a single photo. I not only failed once withmy eldest daughter but again with my second daughter. I failed twice! They are 16 and 14 now.

But I had to face that challenge a month ago. My father is very sick. I shot him for the first time in my studio. I could never have imagined that. When I was young my father would have been the last person I would shoot. But I've done it. It's a portrait and it's the favourite photo I ever took.

How to judge myself as a photographer? In fact, I'm not the guy who creates the photos; the photo is already there. Everything is set, it's all scripted. I'm just the witness. When I take photos I'm just a messenger.