During the initial first contact, the crew of the Belari end up performing a Heroic Sacrifice to protect the Carl Jung from a turian salvo; a Dying Moment of Awesome that leads to Undying Loyalty between the two races.
Tevos giving Aria a well-deserved "The Reason You Suck" Speech after Aria thinks that she'll just go back to being a meek girlfriend and actually gets the Lord of Omega to admit she was an awful lover.
In chapter 32, under Shepard's leadership, his N1 batch sets a new record for highest percentage of passes.