Luffy's is like childlike, in the sense that he tends to go to the extremes. He can either be extremely greedy, especially in cases of food, who his crew is, and adventure; or extraordinarily selfless, going so far as to virtually sacrifice himself to avenge or protect his friends, crew, and family. This childish mentality does not prevent him from often getting to the root of the problem and allowing him to figure out the simplest way of solving it.