Let the Right One In is a wonderful story of friendship. It's a very dark, cold, and bleak movie...kinda like living in Sweden. Hey would you look at that, it's set in Sweden.
The film tells the heartwarming story of Oskar and Eli, a future serial killer and a vampire. The two meet after Eli moves into the apartment complex Oskar lives with his mom. Initially, Eli does not want to be friends with Oskar and tells him as much. However, as time goes on, the two begin to bond and even exchange messages in Morse code through the wall.
As I said, Let the Right One In is a story about friendship. The cinematography is very well done and attempts to convey things to the viewer that can only be expressed visually. It relies more upon practical effects than its bloated budget American counterpart.
Seriously, if you only watch one film on this list, make it this one.
If you have already seen this movie, I highly recommend the book. It goes more in depth into the psyches of Eli and Oskar. If you've read the book, then I suggest you read the sequel: Let the Old Dreams Die.