Metropolis: This is the third feature-length silent film I've seen, and oddly enough, all 3 are German, the other 2 being The Cabinet of Dr. Caligari and Nosferatu. I'm surprised at how visually impressive this movie is. The sets are huge, and there's a lot of them. The first shots of Metropolis, with the buildings, moving cars, trains, and planes is impressive. You have the iconic Machine-Man transformation sequence, and the faces and eyes staring at Machine Maria's bizarre dance. The acting is also impressive, but I guess without sound, you have to express yourself with your face and body language. That's why Rotwang became my favorite character, a mad scientist who reminds me of Torgo from Manos: The Hands of Fate. There's also the aforementioned Machine Maria dance, and she's completely maniacal, compared to the real Maria's more calm, peaceful, loving personality. However, the plot isn't all that captivating (workers want to rise up against their rich, better-off oppressors, while Maria and Freder want a more peaceful solution). This is also one of the earliest concepts of a video phone.
It's not the greatest movie in the world, but it's worth watching, especially if you're interested in early film.