I would say the list includes:

What would you add?

Just saw this one:

static.comicvine.com/uploads/ignore_jpg_scale_super/4/46646/4267385-1.jpg

"I'm Batman"

~Batman.

One of my favorite Batman moments.

For Martian Manhunter

http://m.youtube.com/watch?v=OOJvlMIMmiM

The first one was really bad, but the rest are okay

and this one just because its Mega Brainiac and he fights him alone letting the others run

Here's a good one from Firestorm prior to the New 52; "Right. Enough whining. Not enough winning."

"Not even you can stand against the Green Lantern Corps." - John Stewart, "The Return," directed at Doctor Fate.

"I feel like I live in a world made out of cardboard. Always taking constant care not to break something, to break someone... never allowing myself a single moment to lose control, or someone could die. But you can take it, can't ya, big man? What we have here is a RARE opportunity for me to cut loose, to show you just how powerful I really am." - Superman to Darkseid in "Destroyer!", the final episode of Justice League Unlimited.

"I know what Superman is going through. He doesn't deserve that. Superboy didn't deserve thatr. What do YOU deserve?" - Batman to Alex Luthor in Infinite Crisis 7 when he took Deathstroke's pistol and was going to shoot him before Wonder Woman called him down.

@captain13: whats the first scan from?

also this

"No! We're going about this all wrong! We have to work as a team!" - Hawkman in "DC Super Friends: The Joker's Playhouse"

"The League leads. When there is a Crisis, the other heroes -- and the world -- look to us first to deal with it, to rally others. We set the example" - Martian Manhunter