Scary movies with monsters/aliens?

Some of my favorites are Aliens: Attack the Block (comedy horror), the Alien series, the Predator series, the Thing (I like the remake), Signs, Cloverfield, War of the Worlds.Monsters: Trick r Treat, The Descent, Jeepers Creepers, 30 Days of Night (vampires), Stephen King's The Langoliers, The Cabin in the Woods.Keep in mind, I tend to like movies others don't...