Scaramanga
Brickhead
France. No friends, only interests. And lots of wine and cheese.
England. "Who controls the seas, has control of everything"
I think the unique bonuses are well balanced between the civilizations. I choose England because I like playing as a naval power.
I think the Aztecs sound the most interesting to me. Raiding other civs for their units to become your builders is a fresh way to play. Even more so than Civ V, Aztec aggression will allow them to build up their cities and culture faster than any other warmongers could.
Enslave their population, burn their crops, pillage their improvements, and simultaneously build a thriving and cultured society? Yes please!