Longtime viewer, first time caller. Allez, viens!

6 Countries (personal sub-category: all from 1974)

Blue Eyes of the Broken Doll (Spain, 1974)
The Perfume of the Lady in Black (Italy, 1974)
Lorna, the Exorcist (France, 1974)
Captain Kronos: Vampire Hunter (UK, 1974)
Evil of Dracula (Japan, 1974)
The Bloody Exorcism of Coffin Joe (Brazil, 1974)

8 Decades (note: the '50s through the '10s were represented elsewhere, so I added films from 3 more decades to reach 31 total films)

The Hound of the Baskervilles (UK, 1939)
Dead of Night (UK, 1945)
Zalava (Iran, 2021)

2 Folk Horror

Viy (USSR, 1967)
Kuroneko (Japan, 1968)

4 Films from 1981

The Appointment (UK, 1981)
Dead & Buried (USA, 1981)
The House by the Cemetery (Italy, 1981)
Madhouse (Italy/USA, 1981)

2 Films from Your Birth Year

Hello Mary Lou: Prom Night 2 (Canada, 1987)
White of the Eye (UK, 1987)

2 Haunted House Films

The Changeling (Canada, 1980)
Dark Water (Japan, 2002)

The Worst Part 2 that You Haven't Seen and Can Access

American Psycho 2: All American Girl (USA, 2002)

1 Film Set in the Woods

Blair Witch (USA, 2016)

1 Kaiju or Kong Film (not the new K v. G)

Frankenstein Conquers the World (Japan, 1965)

2 Hammer Films

The Curse of Frankenstein (UK, 1957)
Quatermass and the Pit (UK, 1967)

3 Films with a Person of Color as Director or Lead (Excluding Asian)

Blacula (USA, 1972)
Scream Blacula Scream (USA, 1973)
Def by Temptation (USA, 1990)

3 Asian Horror Films

The Vampire Doll (Japan, 1970)
The Killer Constable (Hong Kong, 1980)
Tetsuo II: Body Hammer (Japan, 1992)

1 Tobe Hooper Films

Spontaneous Combustion (USA, 1990)