I think the "20 good men" scene where he managed to own a great military general (with zero military experience) and incenerate all of Stannis' supplies with zero casualties was ridiculous. There are memes of that line now.
It was awesome seeing Roose recruit the Dothraki horde to defeat Stannis.
I look forward to seeing Brienne kill Jaqen H'ghar and Bronn next season as she teleports through Westeros.
I never read the books, so I've never been prejudiced. I enjoyed the finale and await next season.
Just thought the Stannis - Brienne segment was mortifying. And frankly lame.