Probably would have to go with "Field of Dreams".

Brings back so many memories of  my Father and I - our very rough times when I was a teenager, and knew everything, Baseball brought us back together.  He's gone now and what I wouldn't give to be able to "play catch" with him in the back yard one more time!  

A very happy memory for me is when my son was able to "play catch" with him in his back yard when we were visiting - I hope he remembers.

Still brings a tear to my eye, just thinking about it.

How about when Slim Pickens puts down his flight helmet and picks up a cowboy hat?  Though the set was based on research on a 60's model B-52, and apparently the production tried to replicate it as best they could. I am going to assume you don't work on 50 year old planes. And, it is a satirical comedy...

Baz bought my Dad Where Eagles Dare for his Bday..ya thats an awesome movie too!! Couple more on my list
                                                                                      Reservoir Dogs..Man can't believe I forgot Mr. Pink!
                                                                                      Saving Private Ryan..That Beach scene alone...My Lord...
                                                                                      Gran Torino..A salty old vet??? Highly believable!!
                                                                                      Man on Fire..Slow start..Don't mess with Creasy Bear!!
                                                                                      The Good the Bad the Ugly...Pick any of those spaghetti westerns,,Classic!!
Lady your right..it's hard to pick just one!!! I think thats the beauty of movies..the effect they have on us. Lot of good movies you guys listed!!!

The Count of Monte Cristo was excellent,
We Were Soldiers was awesome,
The Book Of Eli was great,
The Boondocks Saints is cult legend,
All Tarantino films are unforgettable,
The Avengers is already in my top ten,
And so many more wonderful movies and TV shows,
But there is only one all time greatest movie ever....
Star Wars!
May the force be with you!

Too many to list but few notables are:

Basic
13th Warrior
Legend of Bagger Vance
Star Wars all of them

Even Phantom Menace?

My wife and I were working on an all time playlist over several genres.  Here's a few:
Favourite Sci Fi:  The Fifth Element;  LOTR and all Star Wars
Favourite Drama:  The Green Mile and Shawshank Redemption
Favourite Westerns:  Last of the Mohicans;  Silverado
Favourite Comedies:  Young Frankenstein; High Anxiety; Naked Gun
Favourite War:   We Were Soldiers; Patton; Saving Private Ryan

So many more.......

All time: Braveheart

I also like any movie with Tom Hanks, all of the Twilight movies (just something about Kristian Stewart that draws me in), and the Band of Brothers miniseries


FREEEEEEEEEEDOOOOOOOOOOOOOMMMMMMMMM

I couldn't pick just one.

Favourite Sci Fi:  Aliens, Battle LA
Favourite Drama:  No Country for Old Men
Favourite Westerns:  Tombstone
Favourite Comedies:  Talladega Nights, Step Brothers, Anchorman
Favourite War:  Blackhawk Down, Das Boot

Yes even Phantom Menace, just wish they had the technology for the first three they had for the last three. Would have been spectacular.

Got to watch the new spider man a couple weeks ago.  Thought it blew the previous series out of the water, less whiny baby spiderman and more fearlessness.

Die Hard 1 & 2