Luffy: Thanking Rayleigh and declaring that he will be pirate king at Sabaody, or facing BM on the phone and declaring Fishmen Island as his territory

Zoro: We all know the one.

Franky: <spoiler>Saving Zoro in Onigashima </spoiler>

Nami: "Tasukete", Arlong Park., or standing up to BM for Otama

Robin: Punching the shit out of Black Maria.

Sanji: Proposing to Pudding, and telling her that her eye is beautiful, although that could have quite litterally killed him

Brook: "Young woman"

Usopp: Appearing in front of Luffy in Enies Lobby and giving him the strength to fight longer

Chopper: Monster point in Enies Lobby

Jinbei : <spoiler>Waiting for the dude who prepared dinner although everyone else left (1053). That's a smoll moment, but so classy. </spoiler>, or beating the shit out of Luffy till he realises what he STILL has.

<spoiler> Yamato : Soloing Kaido while buying time for Luffy </spoiler>