Spooky movies recommandations ?

Boku no Pico (2006)

Army of Darkness (1992)
The Ring (2002)
Reanimator (1985)
Return of the Living Dead (1985)

I don't usually watch many horror movies, the ones I end up watching usually don't do it for me (mostly because I watch the bad ones), but thanks for the giveaway!

Horror/Thriller is actually my preferred genre when watching a movie so after having reviewed all the other comments... I will try to not repeat and also give some recommendations on some gems (that is <20,000 IMDB ratings):

The Harvest
Good Neighbors
Under the Shadow
The Tunnel - I know somebody already mentioned, but I really want to include again
Hidden
Hell House LLC
Here Comes the Devil
The Invisible Guest - again, I know this is more well known but really a masterpiece ^^
The first half of Jeepers Creepers is honestly one of the best for me. Second half, not so much
Late Phases
The Perfect Host
Goodnight Mommy

Maybe some more will come to me, but these are a good start

I'm not big into horror genre, I much prefer the tension build-up and psychological aspect of Thrillers rather than cheap jump-scares (also thrillers have much less supernatural elements which I dislike unless it's done right, like "the Shinning") but I can give you a recommendation for a movie that is both and really took me by surprise called Orphan
Another great and unique movie that's a comedy and horror mixed in with documentary style is What We Do in The Shadows

Just saw The Thing last night and it is worth a watch. Crazy movie in my opinion. And I am sure you seen it but the Exorcist of course is a great one. It is disturbing to say the least. But like Alien, a lot of horror movies takes inspiration from it.

Alfred Hitchcock's The Birds is a classic spooky movie, especially those who a fear of birds (which is everyone who watches this movie). It's a good example of humans vs animals and sent shivers down my spine!