The only decks I have bought are from Ellutionist or other places:
Favorite all time: Karnival Dead Eyes, they are gory, and creative at the same time, plus two great gaffs
Favorite from E: Gold Arcane hands down, but I never use mine. The Artiface V1 decks come in just after that because I will use them
Deck I am most likely to use right now: White Arcane, I love how pristine they look, regal almost