People criticize the WWE for it's PG Era, and I find myself guilty of doing so as well, but something cannot be denied and that's since Money in the Bank 2011, WWE hasn't put on a bad PPV. A post above said the same thing, and this is what makes the decision difficult.
For me, my favorite PPV event must be Money in the Bank 2011. The Chicago crowd was on fire as always, the Money in the Bank Ladder Matches delivered, Randy Orton and Christian once again put on an amazing performance and of course, CM Punk won the WWE Championship in an awesome match against John Cena. This night is significant as it launched CM Punk into the main event scene for good, changing his character, dynamic and upped his popularity, and as said previously, WWE have done pretty well since this event.
I must say, this past PPV Payback wasn't bad either. The crowd certainly helped, but something really clicked with this event. Curtis winning the title, AJ Lee vs Kaitlyn, CM Punk's return, and Del Rio vs Dolph Ziggler were all really great matches and moments. Shows WWE are sticking to a trend, and a good one.