Diana's relationship with Julia Kapatelis for much of Perez's run. Julia became a second mother to Hippolyta (and it turns out she was fated to.)
From Challenge of the Gods, both Diana and Hippolyta choosing to put the past behind them and try to rescue Herakles from his And I Must Scream situation.
Herakles then begs the forgiveness of the Amazons. They do, unanimously.
The entire last issue of the arc is full of it (perhaps too much). Zeus and Hera reconciling, Steve and Etta admitting their feelings towards each other, Hippolyta and Philippus reuniting, bearing no ill for their previous encounter and at the very end, Diana returning to Julie and Vanessa Kapatelis.
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.
In the alternate timeline of Odyssey, Diana has been receiving help from a mental projection that, unbeknownst to her, belongs to Dr. Psycho (whom she finds familiar, but does not remember). She's finally able to get him to reveal his real form, as a dwarf. When he sadly does so, her comment is "This isn't so bad, is it?" Since this Psycho is a lot less evil than the main universe one, it's nice to see somebody look past his appearance. It's followed by his speech on how he'd rather go back to being a monster, and her enemy, than live in a universe without her, which is also rather touching.
Hephaestus: And I love you even more than that, son.
Diana telling Hades that she loves everyone, including him.
After being critically injured by the First Born, Diana is visited by Ares' ghost, who offers to take her to the afterlife. She says that she can't, to which he replies with a smile "Of course not. That was selfish of me."
In the climax of Brian Azzarello and Cliff Chiang's run, the Minotaur is ordered by the First Born to kill Diana; he refuses as Diana had shown him mercy when she was much younger.