Having read the first three books of ASoIaF, and watched the first season of GoT, I can't decide if I should keep reading the books or just follow the series. On one hand, I find GRRM's writing crude and vulgar (and his use of onomatopoeia makes me cringe, but that's just nitpicking) whereas GoT, like every HBO series I've seen, has impeccable execution. But what I did like about the books most of all, was the characterization, and GoT seems a bit hit-and-miss in adapting that. I love the guy they got to play Bronn, but others like the Hound I like nowhere near as much as in the books. And then there's the level of detail just being lower overall.
EDIT: Not to mention the spoiler risk if I don't keep up with the books, a problem that wouldn't exist if people just weren't such jackasses :/