I would really like to do an RP set in the Embrverse series, though instead of doing something with existing characters, I would rather do one of 3 things:
1) Start right at the beginning, new location, covered in the books or not, with The Change. We'd be starting our own nation(s), which holds a high appeal for me at the moment, fending off looters and making sure that everythign runs smoothly enough that we don't starve. This would be both a personal character RP and involve a fair bit of nation-running, handled from our characters perspective.
2) Existing Universe but much later, speculating what has happened in the remain unrealesed books and modifiing things based on hypothesis argued about in the OOC. If this is the case I could figure out a plot for us to wander through as members of an existing nation.
3) Drop right into the book series. Not my favorite since it requires interaction with at least one canon character and I dislike those types of roleplays.
Personally I would rather do option 1, since it allows for more creativity and less debating, but I am flexible so let me know what you think.
EDIT: Unsure if I should move this to Non-Adult RP's, since sex would not be the entire focus of this RP. Definately more than likely it will happen, along with all the nice gory massacres and rape-loot'n-pillage that goes with a crumbling society, or the violence that accompanies warriors.