The 90's was pretty much mixtapes and 12 inches for me, so this list really ain't that representative of what I was listening to at the time. 90% of my time was house, garage, jungle or hardcore mixs. but looking back....
tribe called quest - peoples instinctive travels
digital underground - sex packets
Happy mondays - pills thrills...
Stanley jordan - cornucopia
Innocence - belief
carlton - the call is strong
the orb - adventures beyond the underworld
The orb - uforb
The brand new heavies - The brand new heavies
Intelligent Hoodlum - Intelligent Hoodlum
va - the rebirth of the cool
masta ace - take a look around
Poor Righteous Teachers - Holy Intellect
Public enemy - fear of a black planet
suzanne vega - solitude standing
x-clan - to the east blackwards
tribe called quest - low end theory
Saint Etienne - foxbase alpha
black sheep - wolf in sheeps clothing
brand new heavies - the heavy rhyme experience
massive attack - blue lines
united future organisation - united future organisation
young disciples - road to freedom
VA- totally wired (there was a load of these acid jazz compilations, can't remember which ones were best though)
VA - Nervous records - sampler (91ish)
leaders of the new school - future without a past
Les Négresses vertes - Mlah
main source - breaking atoms
MC 900ft jesus - welcome to my dream
organized konfision - Organized Konfusion
Poor Righteous Teachers- pure poverty
deelite - world clique
disposable heroes of hiphopracy - hiphopracy is the greatest luxury
william burroughs and disposable heroes of hiphopracy - spare ass annie
gang star - daily operation
grand puba - reel to reel
joao gilberto - Desafinado
va - rebirth of the cool vol 2
pharcyde - bizzare ride ...
x-clan - exodus
black moon - enter the stage
brand nubian - in god we trust
va - illegial pirate radio vol 1
digable planets - reachin
freestyle fellowship - innercity griots
marxman - 33 revolutions per minute
DIY - strictly for groovers
wu-tang clan - enter the wu-tang
joyce - Delirios de Orfeu
Flora e - m p m (this might be a lot older - re-issue, but I got it in the 90s)
mc solaar - Qui sème le vent récolte le tempo
notiorious BIG - ready to die
sasha and john digweed - Renaissance- (a mixtape I know, but it was so well packaged it seemed like the first professionally made mixtape)
jacobs optical stairway - jacobs optical stairway
goldie - timeless
massive attack vs mad professor - no protection
nightmares on wax - smokers delight
dr octagon - Dr. Octagonecologyst
snowboy - Descarga mambito
Stewart Walker - Stabiles
the beatnuts - stone crazy
dark comedy - seven days
morgan geist - the driving memories
eminem - the slim shady
fantastic plastic machine - fantastic plastic machine
Marcos Valle - nova bossa nova
michael nyman - strong on oaks
Plastikman & Thomas Brinkmann - Concept 1 - 96:vr
RZA - bobby digital
aesop - rock float
aim - cold water music
atjazz - that something
bebeto - Raízes Do Samba
freq nasty - freeks geeks and mutilations
mos def - black on both sides
Pharoahe Monch - internal affairs
tipper - the critical path
tom churchill - project one
ugly duckling - fresh mode
Linton kwesi johnson - tings and times
ska invita Now you've wasted my morning are you happy?