I saw Hellraiser for the first time this week. It had long been on my third-tier, "maybe-get-to-it-eventually" movie list, due to its apparent weirdness. But when I learned Andrew Robinson (Garak from DS9, and the killer in the first Dirty Harry) was in it: well, more urgency, naturally. Having seen it, I'm not going to prioritize its sequels much higher than that third tier, but maybe a little—another DS9 alum, Terry Farrell, is in one of them.
I don't think Hellraiser could have come into being without A Nightmare on Elm Street or Friday the 13th. Certainly, it outclasses its forebears in every respect: better acting, stronger mood, freakier freakiness, and one-liners that are both more memorable and more seamlessly integrated into the story. I am already saying "We have such things to show you" in everyday conversation, and "Don't look at me!" has such obvious utility that I've already been using it for years.