I've got a lot that I favor but nothing beats Carol/Advent Carol & Blue/Pink Kimono for me.
I like these sets in general.
Pandora: Carol/Advent Carol, Elegant/Graceful, Highland/Tartan, Home/Away Team, Anesidora, Commander, Feline, Buccaneer, Night/Forest Dryad
Naomi: Blue/Pink Kimono, Hattori/Hanzo, Santa's Elves/Sleigh Ride, Corsair Rouge/Blanc, Plant/Water Nymph
Kai: Sheriff (the black one)