I’ve become a tad introspective about the Rules of Writing. You know the ones, my authorial friends; thou shalt not use adverbs, thou shalt minimize adjectives, thou shalt not reveal Back Story in the first chapter, thou shalt mesmerize your audience from the first word.
Characterisation is at the heart of any really good story as far as I’m concerned. Real people dealing with real situations. Or sometimes (as in speculative fiction) not-real situations. That’s when creating believable characters becomes absolutely crucial. If your characters aren’t believable, your reader won’t relate to them.