A Great Uncle of mine was in the 8th Division, and was taken prisoner at Singapore. He was in Changi, but he lost quite a few of his mates, we don't know where, because he never talked about it.
He returned to Australia in late '46 after going through Rehabilitation, but he was still pretty thin, had horrendus scarring, and frequent nightmares until he died.
He never talked about the war at all. Never put his medals on display, never marched on ANZAC Day. The only enlightenment of what he went through was one night, my Aunty was going to thrw some leftover food in the bin, and He went off at her. He yelled at her about wasting food, how lucky she was, and made everyone finish up all the leftovers.
Other than that, he was perfectly normal and quite religious.