In the anime, pretty much everything Kurotowa says. I don't know, he just makes me laugh.
*after discovering that Kushana made it out alive* "That dream didn't last long."
The way his face does an "oh, well, what're you gonna do?" expression before changing to a much more serious expression. He then yells "Your highness!" in a very heart-felt manner as he rushes over to her.
In the movie, the tank scene.
Asbel eating Chico nuts before commenting on how bad they taste but still continues to eat them while asking "Why does everything that's good for you taste so bad?"
The God-Warrior, a skyscraper-sized colossus created solely for war, cowering before the might of mommy-Nausicaa's anger.
In the manga, when the Worm Handlers demand Nausicaa be turned over to them as their new deity: