I have seen 351 of them.
Of that number, I own 25 on DVD or Blu-ray, so I guess you could call those my recommendations.
They are ...
12 Angry Men (1957)
The Adventures of Robin Hood (1938)
The African Queen (1951)
The Apartment (1960)
Blade Runner (1982)
The Bridge on the River Kwai (1957)
Casablanca (1942)
Chinatown (1974)
The Court Jester (1956)
Dances with Wolves (1990)
The Day the Earth Stood Still (1951)
Forbidden Planet (1956)
How the West Was Won (1962)
L.A. Confidential (1997)
La Bamba (1987)
A Night at the Opera (1935)
The Outlaw Josey Wales (1976)
Purple Rain (1984)
Rear Window (1954)
Spartacus (1960)
The Terminator (1984)
The Thing from Another World (1951)
This Is Spinal Tap (1984)
To Kill a Mockingbird (1962)
Twelve O'Clock High (1949)
Somewhat interestingly, I did not plan to buy two of the above listed films. The DVDs for The Bridge on the River Kwai came packaged with The Guns of Navarone (1961) and La Bamba came packaged with The Buddy Holly Story (1978).
Both packages make sense though, as Kwai and Navarone are two great WWII films and of course, Ritchie Valens and Buddy Holly were killed in the same plane crash. The Day the Music Died, indeed.
Actually 259, but I don't count any movies that I didn't see as an adult, which seemed do mostly consist of Disney movies.
If you type in national registry IMDb list, and then restrict to movies you've seen, you can get a specific number and seconds, no need to count them all. It also might be good to refine what you haven't seen if you're looking for recommendations.
if you tell me your favorite movies or at least genre I could better suggest, so I'll just give you my favorites
Harry and Tonto
La Strada
Nashville
They shoot horses Don't they
One flew over the cuckoo's nest
The Battle of Algiers
Network
The treasure of the Sierra Madre
A woman under the influence
Buffalo 66
I know at least three of these are on YouTube in full
The Freshman (1925)
Intolerance: Love's Struggle Throughout the Ages (1916)
Harold and Maude (1971)
McCabe & Mrs. Miller (1971)
Nashville (1975)
Network (1976)
The Rocky Horror Picture Show (1975)
Sons of the Desert (1933)
Sullivan's Travels (1941)
Sweet Smell of Success (1957)