My choice would be Phantom Hourglass. Why do I choose Phantom Hourglass? Because it was my first Zelda game. It was the game that hooked me for life. It would be a truly amazing feeling to be able to relive that feeling. After all, it was the feeling of discovering the greatest video game franchise ever created. Could you imagine reliving that experience? It would certainly be exhilarating. That's one of the best things about Zelda, after all!
Venturing into a cursed temple, meeting that swashbuckling sea captain Linebeck, sailing from island to island, rescuing the spirits, meeting new friends... all while trying to save your dear friend Tetra from a mysterious Ghost Ship. My first Zelda experience. It would be incredible to be able to relive that.