Predators - Nothing amazing, but a fun watch.
Monsters - Here is one you might not have heard of. It's kind of a gigantic monster movie, but most of the time it is not focused on the monsters/aliens. The movie follows a photographer and his bosses daughter as they try to cross the "infected" part of Mexico (where all the monsters are) into America. Obviously, this is not an easy stroll. Still, they tend to focus more on the characters and their evolving relationship. Really, love stories are so much better when gigantic man eating squids are in the background. I recommend a watch.