Of the 100 races, which one does Valtteri highlight as his absolute best? "It must be my first win in Formula One last year in Russia," he said. "It was so special, because when I was a kid that was something I was really aiming for.
"Once you start your career in F1, that's something you can't wait for. It took me more than 80 races to win my first, so it was a big and special moment for me."
And what about the worst race? "When you don't finish the race, like a technical failure. There have been a few within these 100 races - luckily for me not that many.
"But if your engine blows up or your suspension or tyre fails, it's difficult for people to imagine the amount of work the whole team does and we do as a driver for that race.
"All the preparation and commitment. Then, it feels like sometimes that was all for nothing. So, it's sometimes disappointing but that's life.
"If I've done a mistake and I feel we've missed a good result because of me, it's actually the worst feeling you get, because it's a proper team sport. But that's also part of the learning curve and that makes the team stronger.
"Then, when you overcome that and get the next good result after that, it feels even better and you appreciate it a lot more."