Agree with you. Having fun is the most important. As you reach a certain age, you know your chances to be world champion at any sport are behind you. But you can still have fun. My goal in staying in good shape is never be in a situation when I've to say, sorry I'm too old to do that. Last time I really enjoyed the benefit of the time spent at the gym was when we took a boat to go upstream on the river Kwai. Then all the people my age stayed in the boat and I jumped in the river with the kids to swim back to our starting point. It was really good fun.