Luffy- How far he is willing to go for people who treat him kindly, even if he doesn't know them
Zoro- His unflinching loyalty
Nami- None
Ussop- Bravest character in the series because he feels the most fear but still does what he needs to, even when he thinks he'll die
Sanji- He sticks to his principles no matter what. Say what you will about the quality of those principals, but most people are half assed about acting on what they say they believe in in fiction and in real life.
Chopper- His innocence despite the tradgedy he's experienced
Robin- Loves her friends so much she's willing to die for them in ennies lobby
Franky- The manliest man of all time, always building others up, hilarious even in bad times, and the biggest brass balls in all of fiction, both figuritively, and quite possibly literally
Brook- His commitment to his friend to the point that he would wait 50 years and sail around the world just to keep his promise, the silent strength of overcoming so many years of isolation, cool triangles against walls.
Winbae- sense of justice, immence wisdom, actually improved himself throughout his life without needing Luffy to do it for him
Zoro- His unflinching loyalty
Nami- None
Ussop- Bravest character in the series because he feels the most fear but still does what he needs to, even when he thinks he'll die
Sanji- He sticks to his principles no matter what. Say what you will about the quality of those principals, but most people are half assed about acting on what they say they believe in in fiction and in real life.
Chopper- His innocence despite the tradgedy he's experienced
Robin- Loves her friends so much she's willing to die for them in ennies lobby
Franky- The manliest man of all time, always building others up, hilarious even in bad times, and the biggest brass balls in all of fiction, both figuritively, and quite possibly literally

Brook- His commitment to his friend to the point that he would wait 50 years and sail around the world just to keep his promise, the silent strength of overcoming so many years of isolation, cool triangles against walls.
Winbae- sense of justice, immence wisdom, actually improved himself throughout his life without needing Luffy to do it for him