This topic from Long and Short Reviews was a tough one. I read a lot of books and watch a lot of films, but struggled to think of one that had been particularly influential. Eventually I came up with a film which has been my favourite for many years - Heavenly Creatures.
I first discovered the film when I was 13 and became fascinated by both the film itself and the backstory behind it, to such a degree that I started researching the Parker-Hulme murder in depth. It's a shocking case, both in its startling violence and also in the attitudes of the time - the attitude towards the close friendship between the girls, which would be viewed quite differently now, and also the disgusting comments made by journalists when they discovered Pauline Parker's younger sister was institutionalised (claiming this proved she came from "bad stock").
The film also introduced me to Melanie Lynskey, one of my favourite actors, and made Peter Jackson one of my favourite directors. The passion he brought to the project shows in every shot.
So what has influenced your life?