Horror movies:
28 Days Later - except delete the scene with the army held up in the mansion. otherwise, love the end-of-the-world thing and the fast moving zombies (finally!) which takes me to:
Dawn of the Dead remake! Zombies that run after your butt! Finally!!! Love this movie! The entire dam thing. Sick as in both cool and disgusting! This is tops with Alien. And speaking of Alien, which is IMO the #1 horror of all time:
The Descent! The best dam horror movie since Alien, period!! You just gotta see this movie.