OK, my poll from MobyGames:
What's your favorite game setting?- Futuristic/Sci-Fi: unthinkable technologies, depths of space
- Fantasy: magic and creatures straight from fairy tales
- Contemporary: the modern world we live in
- Historical: the world in the costumes of past epochs
I don't see any need for more choices, e.g. post-apocalyptic is sci-fi closer to contemporary, Star Wars is sci-fi with fantasy elements etc.