I think what I'm really liking about this season is how the storylines of the books are more compressed. What I'm not liking so much is the fact that all the stuff I unconsciously skipped over in the books (a random-access medium) ends up getting a lot of play in the show (a sequential medium). Reek's torture, especially, and as others have noted, the raping.
I'm looking most forward to Tyrion's resolution, with a twist and an oh-no. Actually, I kind of skipped past the oh-no the first time through, then I reread it to get all the points square in my noggin. The reactions on Twitter will be delicious.