I had some friends over during the finale specifically so I could watch their reactions during Tywin's death and, even more so, during the Stoneheart reveal. Dammit, why wasn't Stoneheart in the episode!?!
That scene feels like it was made to be the one of the best cliffhanger endings ever!
I also had a similar internal reaction at the start of the season when my friend told me how much he loved Oberyn after the premiere