Day three! You guys still with me? :P Here are today's categories with my votes!
Most Formidable World: The dark city in Sanctum aka the place where you end up as a suicide. Bleak and terrifying and miserable.
Wanderlust-Inducing: Ravka in Shadow and Bone, barring the Shadowfold, which I would stay far, far away from lol.
Loveliest Prose: This is easy. Laini Taylor's Days of Blood and Starlight.That woman writes in gold and gossamer.
Most Dynamic Main Character: Karou from Days of Blood and Starlight.
Best Performance in a Supporting Role: Thomas from Girl of Nightmares. Everyone needs a Thomas. Cas wouldn't have gotten too far without him.