My friend's grandmother is another example. She was always very proper and prim. But with age, she started to sing out loud in public places. Once, she was in a supermarket and just started singing an old song from her youth at the top of her lungs. People were looking at her, but she didn't care. She said she was just enjoying her life to the fullest in her old age.
There was an old lady in our neighborhood. She was always known for her punctuality. But as she aged, she started to forget the time. One day, she showed up at a party three hours early because she thought it started at 5 pm instead of 8 pm. She was so confused when she arrived and no one else was there, but we all had a good laugh about it later.