I love Jeepers Creepers (one of my favorite movies ever), but the sequel was the definition of lame.
I didn't even know the exorcist was a series. But I'm voting for it based on the fact that the first one is incredible. Actually nvm, silence of the lambs.
Becca
I voted for Scream because i like that as an overall series because its pretty well done. the 4th was even my second favorite behind the original. HOWEVER the movie that scared me the most and still does to this day is Poltergeist. i never saw its sequels but that movie scares the crap out of me
OMG I love that movie!! Have u heArd about all the creepy things that happened after filming. Half the kids died.
Becca
I absolutely refuse to watch the Paranormal Activity movies.
I don't think I've ever seen a series of horror movies. I usually just watch one of 'em and then move on because repetition strips away the scare factor for me.
Does Jurassic Park count? But it never scared me. Oh, well. JP2 is pretty blah, but JP3 was pretty awesome in terms of dinosaur interactions.
Edit: OH. The sequel to Friday the 13th was good. Well, only the first one. It was fun to watch an extreme Oedipus complex in action.
I can't believe that the first Jurassic Park will be 20 years old this summer.