Re: Best Backstory in OP
They havent showed much of the struggle that luffy had to go through, you cant exactly call that proper childhood.
But I think most of the backstories are sad.
Sanji 70 days with little food and all, on a small island.
Robin most of her life, what was she when ohara got burnt down? From then till she became 28 years old or so, she couldnt trust anyone, she kept running from the world goverment.
Nami had her village taken by arlong, and she was forced to make maps for him etc etc.
Chopper was an outcast for both humans and deers.