I wanted to be an explorer, but gradually found the world had been explored and that there was nowhere left, really. Once they climbed Everest in 1953, when I was 10 years old, I thought, 'Well, that's pretty much it now.' But the idea of travelling and exploring and adventure was very strong.
When I'm travelling, I always take my little notebook and scribble things down as I watch them; I'm very much geared to everything that's happening. Whereas, the diary I keep is just about a record of a day I've spent. When I'm filming, I'm looking quite intensely at everything I see and trying to get my own eye on what we're going through.
There are people who travel because they want to push themselves to physical limits, people who walk across deserts or cycle across the Antarctic - like Ranulph Fiennes, who just does it because it's there. And then there are people like me, who are just genuinely curious about the world.
I don't see why it should be remarkable that you can acquire a reputation for fairness and decency. Those are qualities shared by so many people. And the great majority of people I meet are decent people, just trying to navigate their way through the world without causing too much trouble.
I've never had a particular skill. I can't cook, dance, play an instrument, speak a foreign language. This used to worry me. I'd think, when I'm grown up, at 18, then I made it 21, it will be clear what role I should have in life. It never happened. I never signed on the dotted line as the sort of adult my father wanted.
People look for patterns in everything. It's what keeps us sane, I suppose. I struggle to see any patterns in my life. I think I can understand depression a bit because of my sister. My own feelings of... I'm aware that, if you feel down, it can be strangely unrelated to circumstances around you. That's just the way life is.