The 2000's were close because of LOTR, but I feel like the 90's had all around better movies.
Terminator 2
Jurassic Park
Saving Private Ryan
Forrest Lump
The Matrix
The Shawshank Redemption
Schindlers List
Titanic
The Green Mile
The Lion King
Mission Impossible
Independence Day
Dumb and Dumber
The Sixth Sense
Toy Story
Alien
Stargate
Happy Gilmore
Mrs. Doubtfire
Tombstone
Total Recall
Apollo 13