My favorite part about video games is definitely exploring (if most of the game is natural with trees and stuff). Like, in Zelda U, I would love riding Epona and taking in the scenery. But that isn't the most important part of the game, but I do think it's practically required in open-world games (To have explanation by itself to be good on its own)
Can't wait for The Zelder Scrolls 3: Breath of The Wild Hunt!