On writing long vs. writing short: Picking the subject matter.
People are watching SF and reading comics! And taking them seriously! The horror!
Here, you won't find any nine-book cycles of a thousand pages each, about a Sword and a Ring and a Quest. You won't find sexy vampires -- definitely not the kind that sparkle. And you won't find zombies and werewolves shoehorned into public domain classics.
What you will find is science fiction and fantasy made by human hands, with a human touch.
Ever get that feeling you've read this story before? So did we. That's why we sat down and started writing: to get out from under the shadow of mass-market, focus-grouped, demographically-predestined literature that's anything but "fantastic".