I'm not big into war movies, personally. But if we're talking about movies where war figures centrally to the characters, rather than ones where the bulk of the plot centers around combat, then:
Gone with the Wind
Born on the Fourth of July
African Queen
Empire of the Sun
Jacob's Ladder
Of combat movies
All Quiet on the Western Front (the old one of course)
Other movies that spring to mind (or miniseries as well)
Hornblower (maybe it's crazy, but I love this miniseries)
Last of the Mohicans
The Messenger: The Story of Joan of Arc (thats the one with Milla Jovovich)
Memphis Belle
Windtalkers
Wargames (OK, it's cold war, maybe not war war)
And yes, Good Morning Vietnam.
