I've ran these kind of threads on /r/radiohead and /r/beatles before, and they were relatively successful so I thought I'd try on a bigger subreddit. I want to compile a list of /r/movies' top films, divided by the arbitrary categories of letters of the alphabet. I'll post a thread each day, and you comment with your favourite movie starting with that letter, upvoting other movies you think deserve the claim to best song of that letter.