#3 Showing respect to Shinsuke Nakamura
One thing you can say about the former 'Doctor of Thuganomics' is how seriously he takes the business. Whenever a big name from the non-WWE world of Pro Wrestling makes their debut in WWE, Cena responds accordingly, acknowledging how big of a deal it is for many fans in attendance.
His rivalry with Kevin Owens throughout 2015 is a good example of this. The way he spoke with the former NXT Champion in the ring indicated that Cena wasn't about to simply bury him for no reason - KO had his fans and John respected that.
This is because, despite many people's hatred of Cena, they love to see him across the ring from their beloved indie stars. Coming up against the face that runs the place is a sign that you've finally made it in the industry and your hard work and talent are paying off at the highest of levels.
Earlier this year, we got to see another dream match, this time between Cena and Shinsuke Nakamura. With a chance to face Jinder Mahal at Summerslam on the line, Cena put over Shinsuke in a big way, actually bothering to tell a genuine and coherent in-ring story, something Dolph Ziggler had failed to do when he faced the King of Strong Style after his debut on Smackdown.
And at the match's conclusion, John paid the ultimate respect to the Japanese icon, refusing to get angry with Shinsuke after a botched suplex which could have easily broken the guy's neck. After Shinsuke apologised, Cena shook his opponent by the hand, mouthing the words 'don't be sorry'.