User blog comment:DarkSkullPirates/Different Views/@comment-4493594-20121005102909

It's not as much of a point-of-view matter as it is a matter of overall karma.

Luffy for instance may be the protagonist but he is not exactly a 100% morally correct individual.

If you remember Skypiea, he suggested to Nami to just take the gold and make a run for it. He knowingly endangers his crew mates just for his own thrill (most recently by wanting to take the most dangerous route through the New World), he's gluttonous and selfish. And he quite openly enjoys hurting other people - and I'm not talking about the arc villains here but about the poor low-rank Marines who are just trying to do their fucking job.

The reason why he is the "good guy" is because his achievements out-weight his flaws. He has a sense of when to do the right thing.