I'd make a Steampunk RPG, with primitive firearms and airships(dirigible airships, not like the ones in Final Fantasy). World Of Warcraft has done this to some extent. As for as sequels go, I wouldn't mind seeing another Xenogears/Xenosaga title. I would very much like to see a Spelljammer title come out(D&D in space, woot!). To me, it seems like modern gaming technology can exploit a lot of concepts, but don't.