This is one year where I really am loving all my cases, and I haven't yet settled on one. I usually gravitate to my leather cases over time, and I expect that will be the same eventually this year. I have the Andar leather case in Camel Tan, which is lovely, and I have a dark brown Nomad case coming today, so we'll see if that ends up being the big one.
I also use a Spigen Ultra Hybrid Matte, which I really love as a clear case...one of the best I've used, with a great matte finish that doesn't show fingerprints. I also use my Spigen Rugged Armor, which is super comfortable this year - they really improved the textures on it, which feel wonderful in the hand.
So, probably my Andar, but man is it close this year, and I've given all pretty equal billing.