@Squirrelfog said:

1. Willard's voice is captivating

I agree. I love this film... a large reason why is Martin Sheen's voice over.

1. The shot with array of helicopters in line

Not sure which shot you're referring to here. My two favorite parts with soldiers in helicopters are: when the guys sit on their helmets to keep their genitals from getting harmed while flying over Vietnamese territory, and the "Ride of the Valkyries" sequence.

1. Have moral. But also primordial instinct to kill for survival

Are you markoff? Your posting style is remarkably similar to his/hers.