We tipped our server at brunch an extra $15. When we came back a few days later for dinner - appeared to be excited to see us and he became our server for dinner - where we tipped him an extra $20. He was very good, we had very excellent service - and I'm happy. (Win-Win). From this experience maybe we over tipped confused3: Like I said, Ciao was happy and so were we.
Do what feels right at the time!