Character. It’s all about the characters. Are they tall? Short? What color is their hair? Do they limp? Have scars? Are they orphans? Are they secretly gay? Are they openly gay? Are they straight but keep getting hit on by their own sex? Do they have a lot of payments left on their cars? Their houses? Do they like vanilla or chocolate more? What do they do int he bathroom? Do they read? Or stare at the wall? Do the male characters sit down to pee? Do the female ones stand up?