I know this is going to be a controversial choice with some people. Something about home invasion movies are so unnerving because they hit you where you feel safest, in your house.
I had skipped The Strangers for a long time mostly because I heard really bad things about it. The poster stuck with me though. Ever since I was a kid, I've had the feeling of being watched from the shadows only to turn around and find no one there. This film does that a lot.
The first thirty minutes of this film are very well done. It masterfully builds tension. The second act is more in line with your run-of-the-mill horror film, but is still enjoyable.
What I love about this film is what Roger Ebert hated about the movie. He wanted a happy ending for this couple and was found wanting. I'm spoiling the ending of this film because I don't want to lead my audience astray. "I really liked The Strangers until the ending." It's a downer ending, but I like that.
If you have been sleeping on this movie, I highly recommend checking it out.