Hey Michael,
I really liked your stuff. I think you have a great eye and a knack for listening to sound. I think your biggest downfall is your reporter. With every story, I knew within the first few seconds what it was about. The farmer turned singer should not have started off with him singing, that should have been saved for a surprise. It may have worked better if it opened out on the farm with him doing his plowing. Don't be afraid to speak up and tell your reporter she needs to change something with the story. The first line of the woman in the hospital playing the dulcimer should have been later in the package. She told the entire story with the first line. And the swimmer story could have easily gone 20-30 seconds until you revealed that these people are former couch potatoes.
Surprises are fun and you could have had a few. Seeing how good your video is, you should be condfident enough to make suggestions on how the story should be produced. Go into each shoot with a real game plan with the reporter.
My only other suggestion would be to establish where you are. A nice super wide shot to start a piece would great. Hold the nats for a few seconds, then get into track/sot, whatever. If the event is going on inside, you could start with an outside shot of the building and lay the swimming nats underneath or a really wide shot of inside the pool area. Also, when someone is playing music, feel free to establish it longer. Don't be afraid to let the nats go for 3, 5, or even 10 seconds as long as it doesn't get boring. Afterall, that's what the story is about. I'd rather hear the music than the reporter.
Overall I thought it was awesome! Hope that helped!
Joe