Personally I just let my tip speak for their performance. Sure if someone goes beyond their duties I will go out my way to thank them and show my appreciation.
Though I also did not come from a house hold where positive reinforcement / feedback was a thing. I was raised around you did what was expected of you. Do your chores without being told, do well in school etc . . . Had a job you did it to the best of your ability no matter what and no matter if you did not like the person or task.
So generally getting a Thank you for doing what amounts to what should be expected is a foreign concept to me.