Pretty much anything to do with Will and Alicia in Season 1. His loyalty and affection for her is blatantly obvious.
And the voicemail. For a man who is rarely overemotional, his confession of love was incredibly romantic. Too bad Alicia never got to hear it.
In "Closing Arguments":
Will: What if we were to have good timing, just for an hour?
Alicia: I think that would look like an exceptional moment.
In "Alienation of Affection," Cary is called to testify about Lockhart and Gardner a very gray situation. He could easily distort the facts against his old firm, which he resents for letting him go . . . but instead he calmly and icily informs the opposing lawyer that his former coworkers were good people, there was no reason to believe that they did anything wrong, offers an excuse for the fudged paperwork, and no, he has no intention of coming back. Well, not at that point anyways.
"You cannot construct that narrative. I will tell you that I have no reason to believe that thing's forged. I knew Mrs. Florrick and Mr. Lee to be outstandingly competent and ethical throughout my time at the firm."
Kalinda not only finds Grace on her own, but tells Grace not to tell her mom. She refuses to milk this for forgiveness, no matter how much she wants to.
Will is being threatened with disbarment. When Diane finds out, she's so upset she tears up. She then goes absolutely flying out there, tells a Blatant Lie to an ethics board to protect him, and pleads with him to fight it, Will, fight it!
Will and Diane have pulled of an elaborate gambit to maintain control of the firm and stay together, and they're celebrating. They actually start slow dancing. Yes, slow dancing. Platonically.
Alicia agreeing to do the "spouse interview" after she realized that Eli had actually taken her no as a "no" and not pulled strings to get her afternoon off. Their relationship really came a long way over season two.
Then in said interview, the journalist's invasive and rude question crosses the line, and Eli jumps to his feet with a startled "Hey!"
And every Eli scene in the following episode. He has to pry deeply into Alicia's personal life and he's so ashamed he looks positively queasy about it. Also, his seemingly sincere declaration that he's squashing an ugly rumor for Alicia's sake, not Peter's.
Another Eli moment! Peter insists on keeping Eli around, despite the bad PR. Eli wants to leave for Peter's sake and says Peter can't be sentimental. Peter asks "You think that's sentimental?" and hugs Eli.
In early Season 1, Diane asks Kalinda to look into a lawyer at another firm, ostensibly as part of a merger. Kalinda quickly figures out she's investigating a potential boyfriend. The slimeball hits on Kalinda, and when Diane asks about the results,
Kalinda: The firm could do better.
In a small but effective moment in "Hitting the Fan" (Season 5, Episode 5) that is funny, touching, and kind of sad, Will is haranguing Alicia over the phone-and then shows a shining moment of basic human decency in an episode where he'd started out in a borderline Tranquil Fury. None of their interactions at that point have any trace of the anger or vitriol they express before or after.
Alicia: Oh, go to hell.
Will: No, you go!...Oh, your daughter called, she needs you to call her school to let her go on a field trip.
Alicia: Oh. When was this?
Will: About forty minutes ago.
Alicia: Oh, ok thanks.
Will: You're welcome.
When they hang up, there's a brief look on both of their faces, as if to say 'did that just happen?' and you can see them remembering the good old days-and being more hurt by it.