Favorite styles - Majora's Mask and Twilight Princess. I'm also taking into account the design of dungeons and the overall world, characters, atmosphere, etcetera. Least favorite would probably be Phantom Hourglass. I liked the cel-shaded style in Wind Waker but I don't think it translated all that well into the handheld sequels, but that's simply my opinion. Also because I felt that they kind of milked the style a bit after Wind Waker, with the Minish Cap also using a somewhat similar style, but I guess it's understandable. PH/ST are direct sequels, after all. *shrugs*