Most horror enthusiasts agree that “Hereditary” is arguably the best modern horror movie. For older horror movies most won’t shut up about “The thing”. Check both out, they’re both very good
Hereditary is a must-see if you haven't already! It's one of the big ones in the "elevated horror" subgenre that strays from traditional horror and leans into arthouse type stuff. Midsommar, The Lighthouse, The VVitch, It Follows, etc., cross into this subgenre. In that way it's sort of defined like film noir where it's almost more of a style instead of a subgenre, but can be considered both. It's not for everyone but I really like the unsettling, creepiness of elevated horror as a nice contrast to the fun, in-your-face tropes of more traditional horror.
I like creature features and body horror, especially when put in the backdrop of space or if the creature is extraterrestrial.
Color Out of Space was a cool bit of both. But I also like stuff like Alien/Aliens, Event Horizon, The Thing, and Ghosts of Mars. These are the best examples. Most of the movies that fit this pretty narrow scope are cheesy and more funny than terrifying. Horror is already pretty campy, as is sci-fi. You mix the two and it's just a mess. Although without it, you wouldn't get goofy shit like Jason X. lol
I just watched Slither for the first time recently, and it fits this perfectly. It was a great fun campy movie. Highly recommend if you haven't seen it.
My final rant will be about Sir Peter Jackson's earlier work. Dead Alive (aka Braindead) is a movie from 1992 that absolutely blew me away. It is also streaming free on YouTube! It has some of the most fun/disgusting practical effects I have ever seen. What a wild ride. Would recommend to anyone who can find body horror amusing. 10/10
I just watched Totally Killer and thoroughly enjoyed it. I don't think it hits any means of "greatness" but it's a just a fun horror comedy that's a mix of Back to the Future and 80s slasher films. Kiernan Shipka (Mad Men, Chilling Adventures of Sabrina, Legend of Korra) is hilarious in it and Julie Bowen (Modern Family, Happy Gilmore) does fight choreography -- it's a great addition for anyone looking to add something new to their horror comedy watchlist.
I prefer Gothic horror movies (usually with vampires) and some of the very best examples would be Bram Stoker's Dracula, Nosferatu by Werner Herzog, Sleepy Hollow, and Hammer Studios' Dracula.
I'd also like to give a shout out to the most recent hidden gems from this genre that I enjoyed tremendously, The Haunted Palace (Based on The Case of Charles Dexter Ward by H. P. Lovecraft) and The Family of Vourdalak (The second segment from the Black Sabbath movie, based on a story from Aleksey Konstantinovich Tolstoy).
Not exactly sure what I’d put this under, but The Descent. One of the only horror films to really give me a good shiver and make me feel uneasy. Maybe that’s down to the claustrophobic nature of the film.