I am Unity was such a fantastic moment. I remember I had to stop reading and take a breather shortly before the big moment. Things looked bleak for damn near every character. Adolin was stabbed in the gut, Kaladin and Shallan were out of Stormlight facing six fused. Szeth and Lift were struggling to keep Nightblood under control without his sheath. Renarin saw the future; Jasnah kills him and Dalinar has fallen to Odium. Jasnah was just about to kill Renarin. Dalinar had just been virtually destroyed by Odium. I couldn't see an out but I should have trusted Sanderson. It blew me away.
Dalinar flashbacks had some great moments, like him walking out into the highstorm to get his knife he thought he'd lent someone.
Most of the bridge four scenes I thought were great. I was so happy when Hobber finally was able to glow. Learning more about Rock and seeing his family was great. The moment when Lopen finally reached the third ideal.
Oathbringer just had too many good moments to list them all, but one of my favorites was definitely this:
"They looked out at the street and found Kaladin approaching along with what seemed to be an army of five or six hundred men, wearing the uniforms of the Wall Guard.
Adolin sighed softly. 'Of course. He’s probably their leader now or something. Storming bridgeboy.'"