Probably been mentioned here already but the thing that first whetted my appetite for horror was seeing the original miniseries of Salem's Lot back in 1979. I was about ten and the image of Danny Glick floating at the window has stayed with me for the last 25 years. The series and book prompted a life long interest in all things vampiric/horrific - from all versions Dracula (except the dreadful Coppola adaptation) via Jessica to Death to Poppy Z Brite - way too many to mention.