What's your favorite horror or sci-fi flick?

So many no one favorite but off the top of my head i liked Dead Silence, Drag Me to Hell, The Wake-wood, The Haunting in Connecticut, House of Bones, Death of a Ghost Hunter , Scream of the Banshee, Lake Dead, Shutter, Rose Red, Slither, My Soul to take, Drive Thru, The Others, Evil Dead 1-3, My bloody Valentine, Black Christmas, Don't be Afraid of the Dark, Dark House, The Hamiltons, Hostel, Scream, I know what you did last Summer,and lots lots more