I flew in Y, MEL-SIN and SIN-MEL recently.
I had the CSM greeting MEL-SIN. "Is there anything I can do for you, Mr Austman?". I replied that I was fine (and I really was in 80A). The CSM then said "Would you like better headphones?". I had my own, not yet out of their case, so said "Not necessary, but thank you".
I thought afterwards, what else could she do anyway? Are better headphones the limit?
On SIN-MEL, I again had the greeting, and was addressed by name. And was given an Express Arrivals Card. The new SIN lounge re-arrangements had left me pretty unimpressed with the SIN ground service and I mentioned this. Then I cheekily asked "What is it that you can actually do for me?". And there was not really much of a response... Then I thought, how about a newspaper from today? (and not 2 days old, as on offer in the lounge). So I pressed the call button, got the CSM's response (she was just 2 rows back) and I did get a current newspaper!
The problem was, this "CSM" later served meals in the back section of the A380. She was very pleasant and I even got a very nice greeting when the breakfast was served.
But her voice seemed to change to a distinctively masculine register when later cabin announcements were made...
... so I suspect it's not always the CSM that gives this greeting!
I was happy enough with the on-board experiences flying Y.