#1: Probably doesn't: Brock Lesnar
The reigning Universal Champion, Brock Lesnar isn't exactly known for being the friendliest person in WWE.
After all, when your contract allows you a completely private locker-room, separate from the boys, there is bound to be some tension.
Whilst the two have feuded with the past, it is their Extreme Rules 2012 bout that seems to have caused some controversy.
According to reports, the match, Lesnar's first in the WWE in over eight years, was supposed to have Lesnar lose, but Cena being carried out on a stretcher, due to the Beast's mauling.
Instead, Lesnar lost, and Cena happily celebrated in the ring, infuriating the Beast.
Two huge stars, the two clearly perceive WWE differently, and it's unlikely that these two will see eye-to-eye, despite their amazing matches in the past.