I'm glad that the series is moving away from dungeon-specific items. They have been getting a lot more useful because of it. The runes in BotW and the items in ALBW for example were pretty well done. SS was pretty good about item usage, too. But that's kind of the opposite of the point of this...
Most of the items in Twilight Princess. The Spinner and the Dominion Rod particularly, but the slingshot is useless because you get the bow as your very next item. The fishing rod, too, because there's a different fishing rod used in the only place worth catching fish at. The Ball and Chain is...