[@KatherinWinter]
I've done a couple of rps in the past with some friends on various other things not on this site, basically what ever we could rp on, and we left our rps open as heck, there was no real set in stone story, it just had a starting set up then it just keeps growing and expanding rapidly without any specific direction, and a lot of those rps was amazing. I had an extremely short rp once on my game Warcraft 3, with one other friend of mine and we ended up creating a very deep short story that was kind of amazing. though it was fairly short and we ended up never crating a follow up.