For the last however many years, my RP was all chat based. Loose, informal, flexible. Don't like the direction this is going in? Let's start over from point x. I wonder what would happen if y? Let's explore that! We'll call it universe ????? because we've gone on so many tangents already and there's no way this character's timeline actually makes sense. XD
that chat style was how I used to do things with a friend of mine. tho we still did it in dw or gdocs more recently, just as private posts and random threads as we picked up and dropped ideas