My Father-in-law was stationed at Pearl Harbor aboard the Arizona and later was at D-Day. He never mentioned anything about the war.
I know a guy that was UDT in Vietnam era. The only thing he ever talked about was training. One goofy thing - they had to cut a hole in some storage tank (to simulate a boat's hull?) at the bottom of the river (Baltimore area?). He said the muck was so soft that the big tank was in the middle of the muck, so he was surrounded by the muck working in zero visibility.