I had a nice experience with the BF concierge in HKG a couple of months back. The concierge was standing at the BF check-in for my return flight. While I was checking in, he took my business card and laminated it for the luggage tag. But the part that I found more interesting was that he looked at my record and (re-)apologized for the inconvenience I had on my incoming flight (no IFE for the BF cabin). In addition, he told me that CO had already deposited some miles in my account for the inconvenience.

Nothing earth-shattering, but just a couple of nice little things that I appreciated.