Funny, I've been a fantasy fan for nearly 50 years. GOT has never done it for me. Some likeable characters, but for the most part I ended up hating probable protagonists for their stupidity . The gray characters were interesting, but appear so episodically that it's tough to swallow...then a ton of characters that I find not interesting at all, but their stories are interwoven and so bring down the pace of the good stuff. So in short, not a big fan, though the series does have it's high points.
I think overall the series improves on the books. Which bodes well for the show as it reaches the later ones...Martin could use a good editor