I'll start off by listing mine:
The T-800, Terminator 2: "I know now why you cry, but it's something that I can never do." Gets me every damn time.
ADA, Zone of the Enders: I think I'm the only one who played this game more than the MGS2 demo that came with it. I will never not laugh at the exchange of "You may speak like a human, but you're still a heartless computer, aren't you?" "That is correct. What is the problem?"
Codsworth, Fallout 4: He survives the nuclear holocaust despite not having a bunker and waits 200 years for you to come back. When you look at what changes his relationship with you, he mostly just wants you to be nice to people. I never swapped him out as my companion.
B.O.Y.D., Ducktales 2017: He's adorable. 'nuff said.
Kind of bland but I still enjoy R2 and 3PO from the original trilogy. Especially 3PO because years later I still find his prissiness funny.
The fact that 3PO kvetches about everything is very funny robot behavior.
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also my head-canon that R2D2 curses in every beep of dialog.
I think that's part of the concept for the astromech in Rebels, Chopper.
The humor of the Original Trilogy was so well-done. Not too childish like the Prequels, and not quippy like modern movies
Death Star blows up: "Well, that happened."
they fly now
I thought Rogue 1 was really good tho.