Some of my favorite moments are actually either when there's 0 dialogue or when there's nothing but two characters having a conversation.

John's epiphany in like Act 5 where he reconsiders listening to the trolls, and he remembers the bunny that all of his friends managed to get for him and how that bunny was a symbol of all their friendships.

My other favorite moment is the rooftop conversation that Dirk and Dave have where they both realize that they have vastly different views of the others alt self. Dirk realizing he looked up and admired Dave his whole life even though they never got to meet but that Dave hated him because of how his bro treated him. Dirk having this whole realization that even in an alternate reality where they did meet his worst fear of hurting people close to him came true anyways, despite it all. And Dave finally getting a real Brother who like actually cared about him and wouldn't have done any of that to him...it's beautiful.

Also when Rose and Kanaya are speaking in act 5 and Kanaya tells Rose that she won't be able to see her for very long for some reason, and Rose destroys her own gate. I especially like the ending when she writes in her own manuscript that magic is real and signed it with her own name lol because it sort of completes the cycle. I kept trying to find an image of it, but its Rose: Egress that whole entry is so cool and wonderfully written, she had so much aura there I'm ngl.