re: A baker's dozen
Alien(s) were certainly masterpieces. Terrorist aliens were a cautionary and wholesome substitute to touchy-feely ETs. WOTW and Thing (originals) were big favorites of mine, too, although most early SF I can do without. In any kind of listmaking like this, you always think of better choices after you hit the "post" button. Some I might have added to the list were "Chinatown", "Moby Dick", "The Big Sleep" and "Maltese Falcon". And while we're talking classics, have you seen the Roman Polanski/Hugh Hefner version of "Macbeth"?