Absolute newbie: “Oh, a stone on the board!” (starry eyes)
TPK: “This is a 4-4 move and my teachers have told me about it.”
DDK: “Black at hoshi” (lists 9 joseki by heart)
SDK: “Waltheri’s has 43.402 games starting with this move, with the most common response from white being …” (keeps talking long after everyone has stopped listening)
Dan: “Oh, hoshi… This reminds me of a pro game that took place about 197 days after Lee Se Dol lost from AlphaGo, during a tournament. Let’s review it!”
Pro: “Oh, so you want a ko fight?”
EDIT: Screenshot replaced. Still don’t know what polite move is, but better safe than sorry.