I liked a lot things about that season start, but the finale seen was perfect! The Hound actor is great starting from his hilarious one-liners over fucking good dialogue with both Arya and Polliver to his mimics, for example when Arya starts approaching the tavern or during the conversation with Polliver, "You're a talker."
But what I really liked the most was in the overall great fighting scene, when Arya realizes she wants to kill those two. And especially after she smashes the pot on the guys head how slowly and almost gentle takes his sword and move it into his body. No wild hacking or anything, she just proceeds and you could sense her relieve and mild joy and calming down while doing her revenge.