In no order my top 5 90s albums: Rage Against the Machine self titled album, Sublime self titled album, Metallica black
album, Stone Temple Pilots, Core, Nirvana, Nevermind.
Honorable mentions off the top of my head: Beastie Boys, Ill Communication, Dr. Dre, The Chronic, Pearl Jam, Ten, Green Day, Dookie, RHCP, Blood Sugar Sex Magik.
Edit: I forgot Smashing Pumpkins, Mellon Collie and the Infinite Sadness