Gerudo Valley for the music,
Final Destination because its final destination,
Rainbow road because of my love for mario kart 7
Boxing ring because you can have a good fight,
Streetpass quest (or Find Mii in USA) because of the epic music and the fact that the stage has a cool layout,
Prism Tower because of the cool background scenery,
Wily castle, although i always play in omega (yeah thanks a lot yellow devil),
And spirit train due to the epic music and the fact that the concept is cool.