Nosferatu ('22) is tops, it does it for me every time!!!!! It's just SO creepy and otherworldly! Of the Universal horrors, Werewolf of London is a fave, because it has a strange quality all its own too. Also can't get enough of the Chaney Phantom of the Opera. Oh, and I love the Val Lewton Cat People!!!
Speaking of Nosferatu, here's a cool rock music video with Nosferatu visuals that I found, the guy also did a great vid with Chaney's The Penalty as the framework.
http://www.youtube.com/watch?v=lHFeEO01gDQ