For me 1991 was the year:-
Nivana - Nevermind
Pearl Jam -Ten
Red Hot Chili Peppers - Blood Sugar Sex Magic
Metallica - Metallica
Primal Scream - Screamadelica
Massive Attack - Blue Lines
REM - Out of Time
Guns N Roses - Use your Illusion 1 and 2
Levellers - Levelling the land
Blur - Leisure...