It comes from within, doesn't it? You need to challenge yourself to keep happy and curling is hugely challenging. You can win the Scottish, the European and the world championship, as we did, but still have a huge amount of strategy to learn. Good tactics make me happy.

Before going on the ice, I'm so up for it. I try to keep calm. The team talks about who we're playing. The skip has to stay strong mentally. I'm a shouter. I get the guys going, calling them to sweep hard and hurry. I'm happy to have a strong voice.

Sheets of ice might look the same on TV but each sheet is different to a curler. The ice slows down during a game. You might be happy with the ice at one point. Your rocks might travel straighter, but that can change.

It's a curling community and it feels good to be part of that community. I was brought up on an ice rink. My family has always been involved in curling. I like having my family around, my girlfriend around. That adds to happiness. Curling is a social event and people go to the rink to spend time with others.

Injuries make me unhappy. There are a lot of knee injuries when you're sliding on your knees so much. And when you're sweeping, you're going to get shoulder injuries. I'll get better with age. Some of the best skips in the world are in their 40s. As long as the knees hold out.