I want a shooting gallery back. I mean, a full-out one like in OoT. That was a lot of fun. And it would be even better with the Wii remote. I was actually legitimately disappointed to find that there wasn't one in TP.

Beyond that, i guess bringing back rings from OoX would be cool. Customization always makes games more fun, IMO. O, and another Biggoron's Sword option kinda quest