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.
Marvin the Paranoid Android. "Here I am with a brain the size of a planet and they ask me to pick up a piece of paper. Call that job satisfaction? I don't." Sums up my life too well.
Life? Don't talk to me about life!
"Paranoid Android" never felt quite right for Marvin. He's got depression, not paranoia.
As someone who struggles with depression, paranoia can certainly be in the mix. Plus "depressed" doesn't rhyme with "android".