Such a hard decision! Personally, it was a tie between Skyward Sword and Wind Waker. WW was the very first Zelda game I ever played, it is so much fun, not too easy, not too hard. I have a lot of emotional moments tied to it. SS is just SO MUCH FUN! I love the motion controls, all the dungeons, bosses, music, etc. But the thing that made me choose WW was the emotional connection I have to it, I would never want to loose that.