My cat Sadie is about 9 now, give or take a year. Honestly, I have enjoyed having an older cat much better than when she was younger. As a kitten, even up to about 2 years old, she was constantly getting herself in trouble. She would try and knock the fish tank off my dresser to get to the fish, or she would wait across corners and jump out at people and dogs alike. It was pretty scary wondering if she was sitting there in the dark just waiting for you to pass by.
Now that she is older I haven't had any issues. She has matured nicely, and still looks rather young, I'm glad about that too I hope it means she will live a long time. Sometimes she sits so still I mistake her for a cat statue.
I guess you could say her age has had a great effect on my family since she is now a wonderful independent cat that doesn't require a vast amount of attention and we can trust alone with our breakables lying about.