I know that writing to create a particular audience reaction is kind of a chancy affair - if the author takes this too personally, it can lead to things like derailing a perfectly interesting set of character dynamics because the fans are liking the wrong people in the wrong ways - but lately I found myself with two original story ideas whose raison d'etre is "mess with the expectations of the audience." I blame tvtropes and Hideo Kojima.

Idea Number One (tropes: Women In Refrigerators, Sissy Villain, Bishonen, Foe Yay) - the androgynous, flamboyant, scenery-chewing evil prettyboy (although how much time can he have to devote to evildoing when he spends so much of it stalking the hero and flirtatiously taunting him) turns out to be the hero's presumed dead semi-girlfriend in disguise. Her reason for doing this probably has something to do with being annoyed with how he's more interested in avenging her "death" than he ever was in her as a person when they were together.

Idea Number Two (Designated Hero, Designated Villain, Perspective Flip, Moral Dissonance, Start of Darkness, Jerk Sue) - epic fantasy with an extra dose of Dark and Gritty. You have the Chosen One, an inexplicably charismatic macho asshole whose main distinguishing feature is his tendency to make multipage speeches about Why He's Right And Everyone Opposing Him Sucks that are treated by his listeners as if he were the second coming of Demosthenes and Oscar Wilde combined (but more manly and heterosexual). He is, needless to say, ridiculously powerful, and shows an unusual lack of regret, or even the most stoic, understated sort of emotional distress, about his many Shoot the Dog incidents. He and his allies consider any enemies not converted by his awesome charisma to be complete monsters, never mind that they're no more ruthless than he can be and some of them have much more character development. Of course, he inevitably triumphs.
Then we get to the next book in the trilogy, and discover that Our Hero has become the new Dark Lord.