I was thinking about it and is it really luffy's fault he is you know .... the way he is. Just think about it for a second...

he grew up with shanks ( his hero) and his crew and piarates love to have partys and drinking... not the ideal envorment for a kid.. ( but thank you shanks for giving Luffy his dream!)

About Garp... throwing your grandchild into bottomless pits and jungles in the middle of the night isnt what i call a "stable" envorment" Garp was training Luffy and Ace (maybe sabo but probably not) how to marines kinda turned into 'piratate' training. For example Garp had a flash back...

[His Dream Is To Be Yonkou! Meet Monkey D. Ace]

The young man with dark hair laughed handsomely, it was simply not his lucky day, but for a carefree guy like him, nothing seemed to worry him. Just like his father. He clung to the side of the boat, knowing that he would be dead if he fell into the sea. Like his father, he had consumed a Devil's fruit at a young age. However, his father had been proud of him, not angry. According to his father, Shanks had been furious when he found out that Luffy had eaten the Gomu Gomu No Mi. However, Ace's fruit was much different to his father's. His fruit...