The reason I say this is because the show conveys everything that is experienced and said by the characters in the book. However, the one major aspect that the TV viewer is not receiving is what exactly is going on through the characters minds. Also whether they are reminiscing an old memory as they are traveling along a trail on a horse or something.
An example being in the show you'll see them traveling on the horse but in the novel you get the inner thoughts of the character as they are traveling, which gives you a bigger insight on who that person is. Read the novels first then watch the show.
Its hard to keep track of so many characters. Most of the time people who watch the show tend to focus on 2 out of the 7+ major families within the game of thrones universe. The issue of deciding to pay more attention to one family would be nonexistent if you read the books.
I mean yea sure I do realize that by doing this you spoil a lot of plot twists by yourself but at least you'll have a deeper understanding of everything that is happening. It feels great to see everything you imagined while reading on the big screen with such high production value.
You'll also know each characters names instead of referring them as the midget or princess with dragons. I am over-exaggerating a little with the princess though most viewers will know her as Khalese and lack the knowledge of her proper name Daenerys Targaryen. The reason I stress this is because I have lost count of how many of my friends who watch the show lack these bits of information.
Or maybe they ignore the presence of who they define as minor characters in the show. I have to explain to them why they should care about these roles that they deem unworthy based on the TV Show. They would feel differently if they read the novels. As season 4 is slowly approaching I can already see myself explaining things over and over again.
It’s a weekly ritual in my apartment to watch the newest episode with a group of friends, beer, Chinese takeout, or pizza. I usually end up being the encyclopedia to everyone in the room who has any questions because of my knowledge of the books.