From Challenge of the Gods, both Diana and Hippolyta choosing to put the past behind them and try to rescue Hercules from his And I Must Scream situation.
In Warkiller, Diana realizes that Genocide has used her Emotion Bomb powers to poison Donna Troy's mind, causing her to fly into a delusional, Unstoppable Rage when in proximity to the Golden Lasso of Truth. Without hesitation, Diana tosses her Iconic Item into the sea.
Diana: It is a glorious thing. But it is still a possession. You are my sister. And all the gifts from the gods that have ever been aren't worth a strand of your hair.
Wonder Woman #600 has Diana leading a team of all the superheroines against an army of robots build by Professor Ivo. After, she (very nicely) declines an offer to go to a bar with them or to meet the President in favour of attending Vanessa Kapatelis' graduation.
Alexa trading places with Diana so she can compete. Especially Diana's huge smile when she learns of Alexa's plan.
Diana revealing herself at the competition. You'd expect Hippolyta to be angry, maybe even turn her down completely. But she doesn't. She takes the tiara off her own head and gives her full permission to Diana to go.
Hippolyta:I have no doubt you will serve us well, my daughter.
Basically any time Steve talks with Diana, if it's not a Crowning Moment of Funny. Notable points are when he tells her that he chose saving her over stopping Ares because he cares about her, and when he starts telling her about himself on the plane (although that was partially brought on his foot being stuck in the Lasso of Truth). Not to mention the Big Damn Kiss at the end.
Diana teaching a little girl how to swordfight, after noticing that the girl is sad because boys won't let her play with them.