I'm in this sport to win but win by being the best, not by being lucky.
I think, in general, the sport's frustrating because I think it's one of only a few sports in the world where you've got so many other variables. Not taking anything away from the winner, but the best man doesn't always win. I think part of that makes the sport really exciting, and part of it makes it heartbreaking.
I had a very successful 2014, but I have got to keep aiming for bigger and better things, so the world title is my goal.
I try to send out a good message - I sometimes get asked for advice for leaving home and trying to 'make it' overseas. I would always say think long term, and think bigger picture: make the sacrifice.
I love mountain-biking or any form of bikes, like dirt bikes; I love getting out there, although obviously I have to be careful.
In the end, you have to just pull the trigger. Trust the car, trust the brakes, just go.
I do a bit of Brazilian ju-jitsu when I can. I like a bit of that.
In World Series, everything is a bit slower than F1. But each time I sit in the car, whether it is World Series or F1, once I am in the cockpit, I am mentally prepared for what the car is. I don't have to physically drive it to remember what it is doing.
I've definitely got better over the years at conserving my energy in pre-season - at knowing what to focus on and what to let go.
When you spend time working on something for a time period, and then it doesn't correlate, it decreases in your motivation.
I top up my endurance with running and cycling because in a race, your heart rate is up at 150, so we have to train at that level.
I'm sure everyone has a cool story behind how they got into Formula One, but, for me, Perth, you know, not only in Australia is it detached, but it's detached from the whole world.
Because of my schedule and dietary requirements, I don't party a lot, but when I can let my hair down, I will; I think that's healthy. I love a weekend in Vegas.
Getting past my early 20s, I feel a bit more maturity and responsibility about that stuff. You get a good feeling from doing something good. You see a kid and you make his day, you realise the power of it. Whereas before, I was like, 'That's cool, whatever.' But now, that's what I'm most appreciative of.
People might call me a liar for this, but I want a fast teammate, I think for two reasons: it's always going to get more out of yourself, and it's always going to be a more true evaluation of where you stand.
Formula One was just cool. I loved racing, all types of racing, but from a young age, Formula One was the noise and everything, and that's what I was drawn to. I already knew when I was younger, the coolest guys are in F1... not that NASCAR drivers aren't cool, but that was always what I had in my head!
To have a home Grand Prix is awesome, so just to go there is already a buzz.
I'm the most ripped guy on the grid, let's just say that.
Pretty much all the drivers I get on with, at least to say 'Hi' and have a conversation. But when the helmet's on, you don't care who it is. You have no sympathy: someone blows an engine in front of you, if it means you gain a position, then you're smiling.
I know that I'll joke around to the last minute I get in the car. But once the helmet's on - it's sort of a cliche, but it's true - it's quite symbolic that that is 'go time,' and I'm ready to have some fun and be bad while I do it.
