Peeping Tom (1960)
Quite a nice subtle thriller that does just enough to push the creep factor without going overboard into full blown ludicrousness. The killer is just a normal guy, albeit with some oddities, none that would make a person think he's a killer. Only thing I didn't really like about the movie was how the ending seemed a little rushed and anticlimactic. Definitely a movie worth checking out if you're into older films, especially if you like Alfred Hitchco
ck.