I was told the show was a giant rape-fest, and that (blessedly) turned out to be untrue. Still, I'm not sure I can keep up enthusiasm for a show in which every decent person is murdered and every rotten scumbag triumphs. Yes, I know life isn't always fair, but Game of Thrones manages to make the Middle Ages look even worse than it was. I heard GoT was inspired by the War of the Roses, and I'd guess that Joffrey Baratheon is the stand-in for Richard III. The thing is, Richard was only on the throne for two years, as he got a reputation as a sociopathic back-stabbing bastard and it earned him a lot of bad press. Call me an idealist, but even in the Middle Ages there was a limit to how much torture and beheading you could get away with.
That all being said, Game of Thrones is a fascinating show. It has great characters, and the world of Westeros is an interesting one. One small quibble: Like most fantasy worlds it has a hopelessly exaggerated sense of time-scale. We hear the Night Watch has defended Westeros for 6,000 years; that's longer that recorded history in our own world, the length of time between us and the European Neolithic, and I can't imagine any human institution surviving that long. Tolkien's world had a similar scale, but at least he had immortal Elves interacting with humans, and Westeros has no such influence. It's a small point, and doesn't interfere with my enjoyment of the show, but it stands out for me sometimes.