What is your favorite power supply/mobile power Brick from Anker? And why?
Mine is the Powercore 13000 because it is lightweight and easy to carry around all the time, but it still packs a great charge.
Favorite mobile power Brick
I love my PowerCore 20100, I can get around 5 charges for my Galaxy S6 & not have to worry about charging my PowerCore for a good while. 
I also have a 20100 and I take it with me when I forget to charge my 13000