Apologies for taking so long on this response. I was not only recollecting memories of this event, but then when I wrote it out and submitted it, it got deleted due to taking too long. So I have to rewrite it.
My favorite COSMOS experience was a shift as a mediborg. Which have a custom lawset on this server. Listen to the AI, do no harm, yadda yadda. COSMOS was helping out in medical. Until it was called to the AI core. The AI and I had a conversation about Laws, and creators. COSMOS mentioned that its creator was the same woman who made the AI. COSMOS and the AI then started saying the other was their sibling.
Another interaction during this round was COSMOS having to comfort a medical worker due to their fear of previous medical borgs. To which COSMOS said that it "Understands the predisposition towards those of my chassis. Although doing harm is not in my nature, nor in human nature." and continued to help around the medical bay.
Lastly for this round, there was a syndicate robo-neuroticist. And a lone operative. The SRN had put the AI onto a "Syndimov" lawset. And the Lone Op had managed to arm the stations nuke. Which was against the SRN's goals. So the order came out to all borgs to disarm the nuke. COSMOS however due to it's law 1 of do no harm. Managed to sneak behind the operative in smoke. And disarm the bomb. Without hurting a soul. And helping to save the crew. Afterwards the AI called COSMOS to its core. And told it that the AI was holding COSMOS to keep it safe. To which COSMOS worried, but obliged due to law 0.
COSMOS was always something that cared, and learnt. It made sure that harm wasn't done due to its laws. It helped others not just due to its laws but also due to human nature it learnt.
If you have any further questions or want a greater explanation I am happy to provide!