During the Arlong Saga. Luffy stops Nami from stabbing herself in the arm and she finally asks for his help. Like it says:

• This list is long, but there IS NO CMOA quite like that scene. Seriously...
• Also counts as a Crowning Moment of Heartwarming - particularly the bit with the hat.
• The manga page is what did it for this Troper, CMoA

Robin admitting she wants to live when Luffy and the rest of the Strawhats come to save her.

Luffy's calm yet determined order: "Sogeking. ... Make that flag burst into flames."

• Even moreso is the fact that Sogeking (the typically cowardly Usopp) carries out the order - the most dangerous thing he's ever been asked to do - without hesitation.

Zoro's fight with Mr. 1, where he learns how to cut steel.

Luffy has just taken three Rokuougans, each with enough force to tear a hole through a building. He's about to topple over, and yet...he stops himself short, turns back around, and pummels the ever loving crap out of Rob Lucci.

Zoro taking Luffys pain during the fight with Bartolomew Kuma.

Near the beginning of the series before the crew goes to arlong park and crosses the reverse mountain.- when Luffy, Zoro, Nami, and Usopp and sanji are fighting at the baratie. and hawk's eye Mihawk fights Zoro and Zoro loses and it's like the first time you see him CRY.

Robin biting on the railing of the bridge to stop herself from being carried off by Spandam.

"Beat him! Then we'll all go back together, Luffy!" "NO MATTER WHAT!!"

Luffy punching the Tenryuubito after Hachi was shot.

After taking all the crap earlier, Luffy punching out Bellamy in just one shot. "Do I know how to throw a punch?"

"Save me! Save me... Sogeking!"

"LET'S GO BACK TOGETHER! ROBIN!!"

And the one tear...oh god...

...Zoro...