My vote went for the American Adventure as well. Between the amazing animatronics and the song at the end, you can't beat it.
I have never seen any of these, don't care if I do. If I want to learn about history I will take a history class or go to the library (which is free.... not 80 bucks). I pay amusement parks to amuse and entertain me.
They are quality shows and attractions, I think you must be afraid to watch them because of the subject matter, not because they are bad quality or truly boring. If the same technology was applied to anything else, you probably would like them.
Watching Disney and Universal movies are cheap too but you are spending 80 dollars to watch theme park presentations of them too.