I'd say it's a mixture of both, [@JBRam2002]. Currently, I've got a running idea that takes place far into the future on a space station complete with creepy silences, beeping machines, and things of the like. Whoever is interested will of course be told a few more details about the setting that would be general knowledge to their character before being thrown into an establishing shot, if that makes sense? From there, we'd work on plot points that either I don't have fully solidified, or they are itching to play out in the frame I've built.

But if someone's got another, more intriguing seedling of a plot that I think I can flesh out, then we could work on that, as well.