The first video cassette we ever bought - and oh my, that thing was expensive! - was an all-time favorite movie of mine. I don't care much for the sequels. Oh wait, I haven't seen the sequels, I don't think there should have been any.
Again, there is more than one good quote from this movie. Here's my favorite one that I like to use all the time (with the matching gesture). The forensics guy says it after the autopsy of the first victim.