This Halloween, like every other, I shall be watching Halloween 3. Which alongside the Shining is my favourite horror movie and the best of the series.
As an off the wall suggestion for someone looking for something to watch. The TV Show Quantum Leap had arguably its best episode as a Halloween special. It was very creepy and certainly worth a watch even if you never watched the show.
"Quantum Leap" The Boogieman - October 31, 1964 (TV episode 1990) - IMDb