Lobogotti started a post "top 200 films in the past 20 years" here. Moviesnob did one here and here, as did I
Lots of good choices in there you may not have seen, or just barely remember.
To continue, I have mine from the 80's: The numbers are where it ranks in my top 100 alltime.
1980
52 The Empire Strikes Back
81 Airplane!
Battle Beyond the Stars
Caddyshack
Gloria
1981
22 Raiders of the Lost Ark
86 Superman 2
87 Escape From New York
History of the World, Pt. 1
The Cannonball Run
1982
Blade Runner
Fast Times at Ridgemont High
Airplane II
Rocky III
Star Trek II: The Wrath of Khan
1983
80 Monty Python's The Meaning of Life
100 Return of the Jedi
National Lampoon's Vacation
Risky Business
Max Dugan Returns
1984 (great year, could have listed 30+ films)
14 The Terminator
23 The Natural
29 Indiana Jones and the Temple of Doom
43 Muppets Take Manhattan
55 Top Secret!
This is Spinal Tap
Nausicaa of the Valley of the Wind
The NeverEnding Story
The Adventures of Buckaroo Banzai
Red Dawn
1985
32 The Color Purple
33 The Goonies
Explorers
The Last Dragon
To Live and Die in L.A.
European Vacation
Weird Science
Rocky IV
Fright Night
Rambo: First Blood Part II
1986
2 Aliens
51 Ferris Bueller's Day Off
Critters
Platoon
F/X
Star Trek 4: The Voyage Home
The Fly
Lucas
The Name of the Rose
Club Paradise
1987
27 Adventures in Babysitting
54 Predator
58 The Lost Boys
72 Planes, Trains, and Automobiles
73 The Princess Bride
74 Spaceballs
88 Full Metal Jacket
Fatal Attraction
The Running Man
The Untouchables
1988
82 The Naked Gun
96 License to Drive
Beetlejuice
Funny Farm
Die Hard
Bull Durham
Big
Cocktail
Dirty Rotten Scoundrels
Who Framed Roger Rabbit?
1989
18 Field of Dreams
Indiana Jones and the Last Crusade
Driving Miss Daisy
Lean On Me
The Killer
Glory
Major League
Look Who's Talking
Bill & Ted's Excellent Adventure
Batman
1979 and earlier (I rarely watch old movies, because I have trouble sometimes with the pacing, acting style, tech., etc, but these are amazing at any year)
1 Star Wars 1977
63 The Exorcist 1973
64 The Godfather 1972
65 All the President's Men 1976
66 12 Angry Men 1957
67 Planet of the Apes 1968
Alien 1979
Apocalypse Now 1979
Lawrence of Arabia 1962
Around the World in 80 days 1956
The Godfather Part 2 1974
A Boy and His Dog 1975
The Producers 1968
Casablanca 1942
is there a point to this, not really :) but post your favorites!