Yep! I know exactly what you mean, swpthleg. October is a great month for horror movie fans. I just got all my premium satellite channels back in a nice promotion, so I can't wait to watch some oldies but goodies.
Some of my all time favorites that I never seem to tire of watching are The Shining (the remake of this was surprisingly good), Alien, The Thing (remake), Fright Night, A Nightmare on Elm Street (original), The Omen 1 & 2, Night, Day, Dawn of the Dead (originals), Frailty, Misery, Silence of the Lambs, Evil Dead 1 and 2, also Drag Me to Hell was very good, Christine... I can't think of any more at this time.
The worst horror movie I have ever seen is called "Intermedio" starring Edward Furlong of Terminator 2. It is astonishing how bad this movie is and how far this actor has fallen.