Man, this debate feels eternal. I'm not an organized writer by nature, and trying to outline every detail before typing makes my brain revolt. Something switches off when I pre-plan—it feels like homework instead of discovery. A piece of advice I got early on was to just start with a single character in a strange situation, maybe a person who wakes up with a tree growing out of their palm, and see where that leads. You stumble into metaphors you'd never have consciously chosen. That tree might become about legacy, or isolation, or ecological grief. It's not a mess; it's following your subconscious. You'll hit walls, sure, and your second draft will be a massive structural rewrite, but that first messy draft holds the raw, weird ideas you can later refine into something truly original.
Some people swear the best character decisions happen spontaneously. In a story I wrote last year, my protagonist was meant to be a hero, but halfway through she made a shockingly petty choice out of sheer frustration. It broke my outline completely, but it made her infinitely more real. Pantsing can feel like trusting your instincts to tell you what the story is really about, beneath all the plotting you think you should do. The creativity comes from that collision between your conscious intent and the surprising directions your own characters insist on taking.