Someone in the comments referenced how Cena never changes his matches or the way he performs due to the jeers he often receives. My response is why would he, or the WWE, ever allow that to happen??
Hundreds of thousands of kids that walk into arenas forces their parents to drop $50 at least on Cena gear. Not to mention PPV buys, action figures, DVDs, etc. and the fact that he has new gear at least once a year. WWE knows that the kids are where the marketing is, so Cena is going to play smiling babyface all the time because those kids are always going to be there. It's kind of redundant and pointless to scream "turn Cena heel" when its stupid to do so and the reason why is pretty obvious. The only people who would jump for joy at that are people who don't buy WWE stuff and find the PPVs for free on the internet.
My question though, or my question of your opinion, is this: why do we, the smart/internet fans, clamor for Cena to change so much? Think about it, Hogan did the same schtick for 12 years and made millions and millions of dollars for himself and a lot of other people. Yet, you didn't have the same reactions back then. Is it that Cena is on TV every week, sometimes more often than that, whereas Hogan was only on TV once every couple of months? Or is it the influence that the internet has on the fanbase? Hogan didn't have to deal with people checking the dirtsheets multiple times a day and once that started, the fans turned on him pretty quickly. 'Net fans are more prevalent in most arenas than net fans want to think. The IWC isn't as small and niche as it was ten years ago.
Gah, please don't say "IWC" on this site.