#3 He was "The Doctor of Thuganomics"

While the WWE audience is split when it comes to liking and disliking John Cena’s current persona, it’s universally accepted that his 2002-2003 run as “The Doctor of Thuganomics” was among the most entertaining gimmicks of its era.
The polar opposite to how he behaves in front of a camera now, Cena was a freestyle rapper who, along with the slogan “Word Life”, would put down his opponents with edgy language and hilarious insults.
WWE's huge mistake with John Cena revealed - Watch Here!
The character, created by chance when Stephanie McMahon heard him rapping at the back of a WWE tour bus one day, certainly helped make Cena stand out and it was even named Best Gimmick in 2003 by readers of the Wrestling Observer Newsletter.