Don't get me wrong, I enjoy a good dialogue driven show as much as the next guy, The West Wing was one of my all time favourite program and I rate it very highly.
The problem I have with Game of Thrones is because there are so many story lines, they are only allocate so much on screen time for each one at a time and it is difficult to juggle all of them coherently, especially for someone like me who hasn't read the book. I am struggling to remember the names of the characters (25 episodes, that is 25 hours of TV and I still don't remember the name of that Dwarf !).
I am sure it all comes together in the end but there needs to be something in the middle to happen to keep viewers interested. As a TV series, each season should be relatively self contained and there should be some mini arc within it.
For example, in season 1 it was suggested that in the North they won a few battles...I don't remember seeing a single one. In season 3, it was suggested that they attacked some bell tower and lost some 300 men. Well, it would be nice to show that to give the show a bit of an oomph. All the battles in the north were like throw away sentences, I have no idea how big his army is and whether it is 10,000 men or just the 5 guards in his chambers, as far as I am aware 5 men is all he has !