After claiming the All Black No2 jersey in 2014 Coles has been the best in the country by some distance through his work-rate and ball carrying ability, but he has never allowed that to blunt his enthusiasm for improvement.
"For me, I just want to play in this All Black team as long as I can," he said. "Just because I've gone all right in the past doesn't mean I'm guaranteed the jersey. I like coming into the camp and earning respect again and showing to everyone that I deserve to be here, and if I get my chance going out and, I know we say it a lot, but nailing my role and trying to bring a little bit of X-factor to my game.
"It's all right talking but it's about your actions as well.
"I've always had that mindset, even when I play Super Rugby. Every year, if I think I should be there and guaranteed a spot just because I've played x-number of games I'll be out the door.
"With the captaincy, it puts the pressure on - you have to perform. If the captain's not performing then it's not a very good look. At this stage of my career I think it's a good thing for me. A couple of years ago if I had the captaincy I think it would have gone over my head and I don't think I would have performed as well as I can. It's been a good step up for me this year, it's taken me out of my comfort zone and perform and most weeks I think I've done that."
In Codie Taylor, 24, and Nathan Harris, 25, Coles has two inexperienced but high-quality hookers chasing him. He has often paid tribute to the way rivals Mealamu and Andrew Hore helped him during his early years with the All Blacks and now he is a position to return the favour elsewhere.
"There's a new leadership group and that's a challenge for this team. I know it excites me, if I'm one of those guys they look to then I'll be doing my absolute best to give the right advice."