Leave it to Joss Whedon to take a horror movie, with the standard tropes, in a direction nobody ever has before. Ultimately it’s a Joss Whedon movie first, ie a fantasy like everything he does, and a horror movie second. Fun and deserves its status as a classic. (Except for the Sigourney Weaver cameo, which totally breaks suspension of disbelief, because the movie is, like, 80% over, and suddenly you’re like, “Hey, that’s Sigourney Weaver.”) The attention to detail in this movie is unparalleled, there’s a lot here for pop culture geeks to scrutinize at extreme length, and if you type the movie’s name into a search engine, you’ll find they have.
Also, I believe, it has the most monsters in it of any movie: in one of many examples of aforementioned geekery, Screen Rant has listed 81 of them. Not to be outgeeked, the Cabin In The Woods Wiki lists over 90 of them (of which, to be fair, 5 are only seen in outtake footage or referred to in production materials) plus a few dozen more mentioned in the novelization and other official related media.
Not one of my favorite favorite films, but I definitely enjoy it a lot, have rewatched it multiple times without it losing any of its charm, and expect to continue doing so. The very definition of an honorable mention.