Mine would be either the Halloween or the Texas Chainsaw Massacre franchise. Both have had their fair share of duds over the years but overall I still enjoy both franchises.
I am gonna have to go with Halloween, My most antisipated film of all time, I am the die hard fan of all horror movies, such as Halloween, The Texas Chainsaw Massacre, Hills have eye, Scream, IT, Chucky, Jason, Freddy, Etc. My most two favorite is Halloween and Texas Chainsaw