The Legend of Zelda: Skyward Sword.
Great game. It had a good story, great motion controls, awesome dungeons, awesome bosses, a great orchestral soundtrack, and tons of stuff to do.
Out of the Zelda games I have beaten: OOT, Majora's Mask, and this game. I would have to say this game seems to have the best of both games. OOT's dungeons and boss fights and Majora's Mask's plot and characters. (One of the characters from Majora's Mask even makes a cameo.)
If you enjoyed the Zelda games before, this game won't disappoint.