It turns out a lot of the music I like was made in the 90s. This is either stuff I was into back then or discovered after the fact, spanning many genres (shoegaze, grunge, post-rock, metal, neofolk, ambient, noise, industrial, IDM / electronic).
(in no particular order)
My Bloody Valentine - Loveless
Primus - Frizzle Fry
Soundgarden - Badmotorfinger
Nirvana - Nevermind, In Utero
Labradford - Prazision LP, A Stable Reference
Burzum - Hvis Lyset Tar Oss
Bathory - Hammerheart
Current 93 - Thunder Perfect Mind, Tamlin, Of Ruine or Some Blazing Starre, Lucifer Over London
In Gowan Ring - The Twin Trees
Stone Breath - A Silver Thread to Weave the Seasons
Coil - Love's Secret Domain
Zoviet France - Shadow, Thief of the Sun
Nature & Organisation - Beauty Reaps the Blood of Solitude
Lycia - Ionia
Die Verbannten Kinder Evas - In Darkness Let me Dwell
Summoning - Minas Morgul, Dol Guldur, Nightshade Forests, Stronghold
Bal-Sagoth - Starfire Burning Upon the Ice-Vieled Throne of Ultima Thule
Enslaved - Eld, Frost
My Dying Bride - Turn Loose the Swans, The Angel and the Dark River, Like Gods of the Sun
Katatonia - Brave Murder Day
Death - The Sound of Perseverance
Godflesh - Pure
Blind Guardian - Somewhere Far Beyond, Imaginations from the Other Side, Nightfall in Middle-earth
Demons & Wizards - self-titled
Emperor - In the Nightside Eclipse, Anthems to the Welkin at Dusk
Ghost - Lama Rabi Rabi
Main - Firmament, Motion Pool, Hz
Loop - A Gilded Eternity
Godspeed You Black Emperor! - F# A# ∞, Slow Riot for New Zero Kanada
Slint - Spiderland
In the Woods - Heart of the Ages
Sleep - Sleep's Holy Mountain, Jerusalem (aka Dopesmoker)
Stars of the Lid - The Ballasted Orchestra, Gravitational Pull vs. The Desire for an Aquatic Life
Windy & Carl - Drawing of Sound, Depths
Aphex Twin - Selected Ambient Works Vol.2
Autechre - Tri Repetae, LP5, EP7
Future Sound of London - Lifeforms
Orb - Pomme Fritz, Orbus Terrarum
Stereolab - Emperor Tomato Ketchup, Mars Audiac Quintet
Pram - Helium, Sargasso Sea
Dead Can Dance - Aion
Skullflower - everything
various artists - Ambient 4: Isolationism (compilation)
Spiritualized - Lazer Guided Melodies
Ministry - Psalm 69
The Melvins - Bullhead, Lysol
Mr. Bungle - Self-Titled
Faith No More - Epic, Angel Dust
Kyuss - Blues for the Red Sun, Welcome to Sky Valley
Legendary Pink Dots - The Maria Dimension
The World of Skin (aka Swans) - Ten Songs for Another World
Backworld - Holy Fire, Anthems from the Pleasure Park
Elend - Les Ténèbres Du Dehors
Ok that's enough for now...