That is very easy to answer, since I watched it just this past Halloween....CANDYMAN!
Candyman is my favorite horror movie, hands down. Its my favorite because it is probably the scariest horror movie I've ever seen. I lie to you not, just google searching for pictures for this post made my heart beat speed up.
Legend has it that if you say his name five times in a mirror, he will appear. After seeing this movie the first time, I couldn't be in a room with a mirror in the dark for MONTHS, I was 7 years old, now I'm 25 and the movie still creeps me out.
I am pretty sure that the main reason the movie was scarier to me than the likes of Jason or Freddy Kruegger was/is because Candyman is Black. Not that Black men by nature are scary, but Candyman could have been my next door neighbor. While Jason and Freddy were slashing little kids up in the suburbs, Candyman was a descendant of an abused slave killing people in the hood. That hit a little more close to home for me lol.
I think this Halloween I'd like to watch Candyman 2 and 3 over, since I haven't watched them as many times as I've watched the original.
What's your favorite Halloween/Scary movie?