I also like Walker's Cay, Spanish Fly is also pretty good. I like these shows because they usually are fly fishing in tropical places. A lot of guys aren't into that and would rather see a show focused on fishing in other places. Larry Dahlberg's show isn't bad either. I enjoy that he travels to a lot of really off the beaten track places to fish. Places that don't really even have guides, lodges, etc.
One of my favorites was Fly Fishing the World. I think this is now being run on the OLN network, which I don't get. It was sponsored, I think, by Ford and was really well done. They would have a guest actor and it usually took place at a top flight high end fishing lodge.
It all boils down to sponorship. If you have the backing, you can put something really nice together. I like the format of having a famous actor or sports star as a guest and I wouldn't mind seeing a good combination of top hunting and fishing trips.
