For more years than I can remember - Planes, Trains, And Automobiles has been a Thanksgiving Day tradition for me. With the smell of dinner filling the house on a cold day, and mirroring the story, the film fits perfectly. It's one of my favorites. Another favorite of mine is The Breakfast Club. I'm a huge fan of films that take place in a single room or location. It's quite a task to pull that off successfully and Hughes' work on that film is excellent. As Boost said, a truly iconic body of work.
R.I.P. sir. You defined, as well as preserved, the 80s. They wouldn't have been nearly as much fun without you.