Cross Roads and other music channels. I have satellite so I can pick and choose from them. Some are shows that have a narrator and will discuss the history of the music being played. Very nice.
I miss Steve Irwin and I love the animal planet.
History Channel is another good one too.
One more the AMC American Movie Channel has some good old movies sometimes. No sitcoms or soaps that is a waste of time. I read some of your post on the crab boats and I could watch that once maybe twice and catch on to it and find it educational for sure but all the time