The game of my dreams: an open-world / sandbox RPG where I am given the choice of genre, technology, setting, character, and so forth. Do I feel like playing in a medieval setting with science fiction weapons or would I prefer an interstellar adventure with flying pirate ships and bronze age weapons?
True freedom to choose how I want to play. Let me adventure, fight monsters, collect treasures, and explore a vast array of possibilities. When I'm done, let me carry my world and time-hopping hero to different times and places.