I have relatives that served in Vietnam (drafted, most served in the enlisted ranks), and worked with several other Vietnam veterans (all retired officers, all were career military, and nearly all had been commissioned before the Vietnam War had started).

I, perhaps oddly, do not know how my relatives feel about the war or the Ken Burns documentary. Most flat out refuse to talk about those years. Perhaps that's not so odd, given the times and situations they faced both abroad and on coming home.

The folks I worked with, on the other hand, were pretty uniformly proud of the job they and their men did. They did not all agree with the politics surrounding the war, both in recent years as well as at the time, but being professionals, they did as they were ordered. Several of them, now professors of U.S. History, thought the Ken Burns' documentary was very well done, and reflected reality in a way that Hollywood never did or desired to. A couple of those professors include the Burns' documentary as part of their courses' curriculum.

I don't know if any of that helps with your curiosity.