In places such as Kazakhstan and Mongolia people depend on each other a lot more. We can often be quite detached in the West, with e-mail and telephones, whereas in those countries people rely on each other more. It's lovely because you feel like, although you're a stranger, they respect you as a friend and want to help you.
When you're nuts about motorbikes, sooner or later, you get to the point where you really want to do a long journey.
He was an amazing actor and could mimic anybody's voice. My sister Katrine was walking past one day and could hear our dad shouting and thought, 'God, I won't go in that room!' but realised it was Nicol Williamson mimicking my father's voice perfectly.
Dad was a tough cookie. He expected a lot from people when they were employed to do a job. If they don't do it properly there's not much time for pampering. He came from making films like 'Deliverance' and 'Point Blank.' He was renowned for taking on tough movies. He revels in that kind of thing and people feed off that enthusiasm.
There's a whole culture now where you meet travellers who don't give you a scrap of paper with their address on it, they give their GPS coordinates. 'I've seen this amazing place in Malawi you've got to go to! I'll give you the coordinates!'
GPS devices are fantastic, but when travelling, especially in the middle of Africa, you must always bring a map as well.
On the whole, GPS is fine but you still need maps because the information available can be different to what's on the ground. You need to be vigilant for obstacles.
If you say to people, 'I'm off to Papa New Guinea,' you'll often get a bad reaction - usually from people who've never been there. There's this fear of the unknown. And 99% of the time, you end up surprised - it rekindles your faith in humanity.
We all live in a very tranquil, sanitised world where you're told to do everything, and when you travel, it's very liberating not to be in that crazy, nannied state.
It's very difficult to say what experience was the hardest. 'Long Way Round' was the first one, so we didn't know anything.
I was dyslexic - still am dyslexic - and as child, I found things very difficult. I think my father realised that in acting and stuff I could express myself.
All kids love bikes and cars. But there was a guy in my local village, Tony, who gave me a go on a bike. My first proper motorbike was when I was about 12, but I'd ridden on his and he was the one who really got me into bikes.
If you're dyslexic I think it's very important to know that you can do anything you want and it's not simply because you're dyslexic that you should be shoved on the side.
Get on to social media and ask questions about the areas you're going to. You'll be surprised at the amount of responses from people who want you to experience some of the amazing things they discovered themselves.
Africa can make people see things differently, and they realise the world is not as dangerous as people think.
Long Way Round' was the first time Ewan and I had done anything like that. We went through Mongolia and Siberia and places like that, so it was very tough.
I always wonder who people are when I meet them; where they live, how they get home from work and little things like that.
I feel I have got away with beating cancer so I am now living life to the full and not worrying about whether it will come back.
When you ride electric bikes, you know the terrain that you're riding on becomes a factor and headwinds become a factor. Then there is tailwinds, which is behind you... it makes such a difference going downhill and stuff like that.
I appeared in several of Dad's films - at the time, I didn't really appreciate how great a director he was.
We have a Mercedes Viano, which is a sort of posh people carrier. I told my wife I bought it for the kids, but the real reason is that I can put my dirt bikes and a mattress in the back, then get out of London for the weekend.
Unlike London or other big cities, there's a great tolerance for motorbikes in Ireland. Culturally, it's quite different.
I think people saw him as someone who did good things for Ireland. If you looked at all the Irish actors in 'Excalibur' alone - Gabriel Byrne, Liam Neeson - there was a whole gaggle of Irish actors who've gone on to become stars, so Dad was really part of that.
My ideal holiday would be to spend the first week doing lots of fun stuff, then to spend the second week relaxing on a beach.