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.
It's a boring choice but: Data and Lore from Star Trek
I also love every robot from the Portal series.
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I did appreciate that they didn't chicken out on actually exploring what a romantic relationship between an artificial life form and a human would look like, too
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They even get married and it's adorable
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Spoilered, sorry. I just love this shit
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Hey, they're family
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It wasn't even trolling, it was entirely appropriate according to the wedding customs that were explained to him
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Isaac and the Kaylon generally are very good. Even Charly admitted that
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killing the builders was entirely justified and she was specifically there to be the Dr. Pulaski to Isaac's Data.
Speaking of which, what did you think of Charly? I've seen that the fandom's reaction to her is generally very negative, and I think it's because as a younger, hotter Pulaski she gets the hate Pulaski did but magnified by the Gamergate lens.
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I haven't seen that yet, I want to finish DS9 first. But I will!
The Orville is very good, and is a genuine Trek show