I watched "The Battle of the Bulge" (the old 60's Henry Fonda movie) with Grandpa once. When it was over, I asked him what he thought of it.
He said, "It was a fine movie..." (it wasn't, but Grandpa wouldn't ever say anything bad about anyone) "......but no one in it looked cold enough."
Now, I judge all war movies by how cold/hot/wet/hungry/dirty/miserable the actors look. Band of Brothers did pretty well, I thought, as did Saving Private Ryan.