There are two tropes popular now that I wish would go away:
1. Zombies. Really, enough with the zombies.
2. Post-apocalyptic settings. See, "Zombies".
Interestingly, regarding number 2, there doesn't seem to have been any serious effort put into creating a Mad Max game for last generation or current generation consoles. That would be the only post-apocalyptic game I'd consider playing.