Since I have some time to kill, quick thoughts on the show so far,
Oberyn vs. The Mountain: The fight was great. The buildup was very good. Pablo Pascal was fantastic. Great job HBO. When I read the book, I was 100% positive Oberyn was going to win. Still can't get over it.
Missandei: I love the actress that plays her. However, the character is all wrong. There's not enough tragedy of loss childhood and emotions because of the horrors of slavery. Missandei is supposed to be a child prodigy that is ruined and misused by her masters. I don't know if her interaction with Grey Worm will salvage this character. I hope it does.
Sansa: I like that she is finally showing some cunning. Book Sansa evolved way too slowly for me. But does it have to come at the expense of Littlefinger? There's no way Littlefinger would allow himself to be in that precarious position to need a save from Sansa.
Gilly and Mole's Town: To me, this was just filler. How about some Mance Rayder instead?
Arya and The Hound: They are both wanted fugitives so I find it quite odd that they would so openly announce their identities in public. This piece of the story just gets worse and worse the more they move away from the books.
Ramsay and Reek: Loved it.
"And so he spoke, and so he spoke, that lord of Castamere. But now the rains weep o'er his hall, with no one there to hear." - The Rains of Castamere