You know what I've always wanted to write? A version of "Lord of the Rings", as told from the perspective of the orcs.
Because that's got to be fascinating stuff. You figure the orcs are all hanging out in Mordor, disaffected and unhappy with their lot (let's face it, they live in the arse-end of the most hideous part of the world, while the elves and humans get to live in freaking tourism ads made real)...and then all of a sudden, Sauron comes back. Not as a physical being, just as this sort of vague, whispering corruption that says to the orcs, "I can give you more..."
And that sounds awesome. Sauron's talking about crushing the hoity-toity elves, giving them real lands where they can raise their children tall and proud, letting them run free in the beauteous lands of Middle-Earth...all of the orcish leaders are telling everyone it's a great idea. They're making big speeches about the destiny of the orcish race finally having arrived, promising great things...
But it doesn't escape everyone's notice that in practice, this amounts to vast numbers of orcs being funneled directly into the path of a freaking human wood-chipper named Aragorn and his two buddies, who make jokes about their orc-slaying competition. And so some of the orcs start to say, "Hey, whoa, wait a second. Mordor sucks, but at least it doesn't involve me being spitted on a lance by the Riders of Rohan."
Needless to say, that's when things get nasty. You get orcish secret police, mutiny, dissent, coups, counter-coups, and behind it all, the voice of Sauron, always whispering, always searching, always plotting...I think it could be a lot of fun as a story.
I mentioned it to an actual Tolkien fan once. Turns out there are, um...issues with the idea, canonically speaking.