babark: Oh, you meant one-liners or specific phrases and words that stuck out, rather than the overall voice acting (or a character's voice acting) in a game?
Why not both? If the voice-acting has a specific line(s) that sticks, that is the golden memory is it not?
For some games, one-liners were pretty much the only voices in the game. But if it was delivered in a way that felt good to you and stuck in your memory...that's the core of the memory. And good voice acting as a whole in a game is fine to mention, but was there anything...more. Something that stands out?
For example, Patrick Stewart's voice in Oblivion was great as a whole, applause all round, but the one line that stuck was that moment he spots you in the jail and says:
"You ... I've seen you... Let me see your face... You are the one from my dreams... Then the stars were right, and this is the day. Gods give me strength." Golden Moment.
Hey, I'm happy with whatever you're comfortable sharing. Keep up the memories!