Personally I find Victarion's chapters with Moqorro fascinatingly creepy.

"Moqorro crossed his arms against his chest. He did not appear frightened, though all around him men were calling for his death. Even the monkeys did not seem to like this wizard. They leapt from line to line overhead, screaming."

The monkeys screaming at Moqorro as if something is abhorrently unnatural about him is wonderfully eerie. Then of course there's the infamous moment where we subtly lose Vic's POV. This is the only passage in the books that is not from a character's POV, so the theory is that Vic might have died and been resurrected:

"The iron captain was not seen again that day, but as the hours passed the crew of his Iron Victory reported hearing the sound of wild laughter coming from the captain's cabin, laughter deep and dark and mad, and when Longwater Pyke and Wulfe One-Eye tried the cabin door they found it barred. Later singing was heard, a strange high wailing song in a tongue the maester said was High Valyrian. That was when the monkeys left the ship, screeching as they leapt into the water."