Nimitz was 60 when the war ended, and he was the exception, as were a few others. Heck, Halsey began to make some serious mistakes as the war was coming to its conclusion, with his bad judgment at the Battle of Leyte Gulf, compounded by Typhoon Cobra shortly thereafter, and then again when he made poor decisions regarding Typhoon Connie in June 1945 and got more men killed and damaged ships, including the USS Portland which lost her bow.
IIRC, Admiral King was livid and wanted Halsey relieved of command and courtmartialed, and Nimitz was pretty upset too, but they realized Halsey was still a hero to many, and Admiral John "Slew" McCain (John McCain's grandfather) voluntarily fell on his sword and graciously took the punishment for Halsey. Admiral McCain stayed in the Pacific long enough to attend the surrender ceremony aboard the USS Missouri, then flew home the next day. I think he hadn't been home once since the war began.
They had a welcome home party for him the night he got home, and he suffered a massive heart attack and died. Wow. He was only 61, but in the picture below, he looked about 80.
He lived hard, swore hard, smoked hard, and drank hard, as many of those men did.
By all accounts, his men adored him.
They called him "Popeye" due to his weathered looks and his beat up, nasty hat with the scrambled eggs that had turned green with age and corrosion. It was his "lucky hat", and it was said that one time when it blew off his head on the flight deck, a crewman nearly went over the side trying to retrieve it, they loved him that much. (That hat now resides at the Phi Delta Theta (his college fraternity) Museum in Oxford, OH.)
Halsey (who was a bit of a prissy "bathroom dawdler" and neat-nick) was repulsed by the disgusting hat and said it was the most disreputable hat he had ever seen any Naval Officer wear, but he was never able to get McCain to toss it!
It was also said that Halsey, who was a clean freak, got so irritated with 'Slew" McCain walking around the bridge of his ship spewing cigarette ashes to and fro from the long gray tube of ashes he just let stay there on the end of the cigarette until gravity made it fall without the aid of an ashtray to land in) that he detailed a sailor to follow him around the bridge and sweep up after him!
He is someone I would have liked to have met.
Oddly, I served for a few months under CDR John McCain when he was released from the Hanoi Hilton and they gave him a training command (VA-174 Razorbacks out of Cecil Field, FL) but it was clear even then he wasn't his grandfather or even his father, who by all accounts, was a solid leader.
Note: It may sound like I don't admire Admiral Halsey-but I absolutely do. I just think his age and the stress of command caught up with him in late 1944.