I’m going to tell you a story about llamas. It will be like every  other story you’ve ever heard about llamas: how they are covered in fine  scales; how they eat their young if not raised properly; and how, at  the end of their lives, they hurl themselves – lemming-like- over cliffs  to drown in the surging sea. They are, at heart, sea creatures, birthed  from the sea, married to it like the fishing people who make their  livelihood there.
 Every story you hear about llamas is the same. You see it in books:  the poor doomed baby llama getting chomped up by its intemperate parent.  On television: the massive tide of scaly llamas falling in a great,  majestic herd into the sea below. In the movies: bad-ass llamas smoking  cigars and painting their scales in jungle camouflage.
 Because you’ve seen this story so many times, because you already  know the nature and history of llamas, it sometimes shocks you, of  course, to see a llama outside of these media spaces. The llamas you see  don’t have scales. So you doubt what you see, and you joke with your  friends about “those scaly llamas” and they laugh and say, “Yes, llamas  sure are scaly!” and you forget your actual experience.
And then there came a day when you started writing about your own  llamas. Unsurprisingly, you didn’t choose to write about the soft,  downy, non-cannibalistic ones you actually met, because you knew no one  would find those “realistic.” You plucked out the llamas from the  stories. You created cannibal llamas with a death wish, their scales  matted in paint.
 It’s easier to tell the same stories everyone else does. There’s no particular shame in it.
 It’s just that it’s lazy, which is just about the worst possible thing a spec fic writer can be.
 Oh, and it’s not true.