I'll agree that the Ice and Fire series' last book had little happening. I hope that trend stops. But I love they way it's set up, with a character for each chapter. There's a dozen main storylines that all touch each other.
I hate regular fantasy because it's stupidly simple. I remember a couple of series with Drizzt do'Urden or whatever it was. What a bore. You could almost expect the author to write something along the lines. "with the last slash, he killed the <big bad monster here>. He levelled up.". Stuff like Dragonlance was also along those lines. So one member of them is "evil"... how different... you still have the stereotypical barbarian, thief, etc... it's all the same.
Martin's world is low-magic, and that makes it pretty credible. The characters are extremely well wrought, with one or two exceptions, and it's usually very easy to believe in their changes throughout the story. It's almost certainly more complex than anything you've ever read in fantasy. The first book may take a while to introduce all the characters (I still loved the beginning), but then their stories break apart and come back together in really interesting ways. He makes use of the full breadth of both characters and geography.
By this I mean that if you don't read it first, I will find you and beat you up