Swimming was simply mandatory - we live in Michigan and given all the water sports, being a capable swimmer was required. DS13 started with swimming lessons at 5, got talked into joining the local team by his instructor, and stuck with it for 4 years. At the middle school level, things start to get really competitive, and he didn't love it enough to do it 5 days a week. End of swimming, in a formal setting, but he is still a water baby and takes every opportunity to spend hours in a pool or lake.

He has all the right traits to be an awesome distance swimmer; I hope in HS he'll go back and give it a chance.
He plays basketball and soccer with his school league. Because it's a small private school, he gets to play a lot and the emphasis is teamwork over win/lose. Dad taught him the basics of golf, which we all play. He really doesn't have a competitive bone in his body (like his mom), and I recognize that, so we focus on fun and competency. I am trying to let him enjoy being active - I just go where he leads. It sounds like next winter will be skiing!