I've always liked the Ice Arrows to be honest.
I don't know why since they've hardly been utilised which is a shame, but I thought in Majora's Mask they were used to great effect. The Arrows didn't just offer a more potent attack, they became a pivotal part in puzzle solving. Using the ice Arrows to freeze water/enemies is such a simple concept but the execution was great which had me wanting more and yet we have seen so little of them since.
Here's for hoping that Zelda U, which made the Bow the focal point of the trailer, puts more emphasis on different types of Arrows not the only for combat purposes but for puzzle interaction too.