Best of all:
Band of Brothers, Watch it every year Memorial Day week.
Disapointment: Flags of Our Fathers, one of the best books ever but the movie was not even 1/2 as good as the book. On funny side: Sweet Home Alabama, reenactment of Gettysburg, When the all charge and die, that was funny.
No mention yet of “The Big Red One”. Best squad level action movie made prior to “Band of Brothers”, which should top everyone’s list. Also, the flying sequences in Wings” (1927) were outstanding and featured some actual WW1 vintage aircraft. “Twelve O’Clock High” is also one of the best war movies ever made, along with “Battleground”. Other worthwhile early movies are “ The Grand Illusion” and “All Quiet on the Western Front”
I liked “Flyboys” in general. It was one of the better WW1 flying movies made, and the first with serious special effects. The major mistake of the movie from a technical standpoint was that they had every German pilot flying a blood red Fokker Triplane.
Another decent movie along those lines was “The Blue Max”.
There was also a good squadron level series on PBS several years ago about the Battle of Britian called “Piece of Cake” which is worth watching.