Can't remember the precise phrasing, but the bit where Michael teases Spock about his beard. "You really think that beard is working for you?"
Saru: "The Starfleet Manual offers no regulatory guidelines for interactions between humans with Klingons grafted to their bones and a ship’s doctor returned from the dead."
Stamets is inspecting his spore cultures individually while Spock and Burnham are at a console silently working through a problem or their own together... Stamets: You're fine. You're fine. Come on, which one of you is missing from my spore drive? You're fine. You're fine... [then talking to Spock and Burnham] Could one of you say something, please? I don't like to listen to myself talk when I have an audience. Spock: We're thinking, commander. Stamets: Think louder. Then after a few minutes of Spock and Burnham slightly bickering about how to approach their problem.... Burnham: ....Maybe we need a little inspiration. Stamets: Could you find that inspiration somewhere else? Turns out, your loud thinking is distracting.
I absolutely love the bit in "Such Sweet Sorrow II" when, during the pitched battle against Control, L'Rell bursts out laughing and says "And I thought my Chancellorship would be bloodless!"