The framing device for the story; Rick wants to show the world that Hulk isn't as bad as people make him out to be.
The little girl's reaction to being saved the Hulk.
Doorway to Destruction Part 2
When everyone else comes back to rescue Hulk from the Negative Zone.
The fact that Hulk wasn't mad that Iron Man made a Hulkbuster unit to fight him, he was mad because Iron Man made Hulkbusters designed to take down his friends and family.
And after they foil the Leader's plan, Iron Man tells Hulk that he'll be decommissioning the Hulkbusters. Hulk's response? He tells Tony to keep one in case he or any of the other Hulks ever lose control.
Red Hulk admitting that while he may not like Hulk, he still respects him nonetheless.
Hulk feeling responsible for Rick, feeling that he's the reason he became A-Bomb and is in danger with the rest of the team.
The Incredible Shrinking Hulks
Skaar turning on the Leader to save the other Hulks, then admitting that he considers them to be family.
Of Moles and Men
Despite the fact that the queen of the Larva Beasts was now attacking Hulk's hometown and no longer Subterranea, the Moleman and his minions decide to help Hulk rescue his hometown from her instead of being ungrateful bastards as what would normally be expected from villains. When the threat is finally dealt with, Hulk acknowledges their efforts and gives Moleman back his crown and title as a reward.