This is a hard one. I have decks that I don't often use, but feel like home to me. They are decks that no matter how long I spend apart from them, when I pick them back up, no time has passed. They are old friends, and I cherish them.
And then I have decks that are like new crushes. They are decks that I have intense love for in this moment in time and they consume my thoughts. I have no idea if they will be my favorites years from now, but at the moment they mean the world to me. So I feel like I must give my favorites with that in mind.
All time favorites: Bohemian Gothic and Liber T
Current favorites: Wild Unknown and Prisma Visions