Sketching out a character sheet before I write always feels like putting down the foundation for a house. I used to just dive into a first chapter and let the people reveal themselves, but half the time I'd hit a wall in the second act because I didn't know what my protagonist would actually do. Having a document, even a messy one, with their core fear, a secret they keep, and what they think they want versus what they need, creates internal conflict I can mine for plot points.
For my last project, I realized the antagonist's motivation was just 'he's evil,' which made every scene with him flat. Filling out a sheet forced me to give him a tragic, misguided reason for his actions. Suddenly, the confrontation scene wrote itself—it became a clash of ideologies, not just a physical fight. The plot gained depth because the characters' decisions started feeling inevitable, rooted in who they were, not just what the outline needed them to do. It’s less about filling in eye color and more about knowing the engine that drives them.