My favorite proteins are Ketogenics Zero Carb Protein (Whey Iso/Micellar Casein Blend) and their Iso Whey - high quality protein sources, a lot of flavors to choose from, mixes easy, and tastes good.
I use them pretty much interchangeably most of the time but I do try to go for the Zero Carb Protein before bedtime; not because its zero carb but bc its a whey/casein blend.
My second choice would be Trutein which is 45% Whey, 45% Casein, 10% Egg.
I haven't found a straight Casein in years that I like the taste of; and I like the whey/casein mix before bedtime.