Personally, I never EXPECT a tip. It is always VERY much appreciated, of course but I NEVER expect nor think badly of a gentleman who doesn't tip.
My neighbor once told me that she never tips at her nail salon because their rates are what their rates are. I always generously tip my nail tech because I'm sure they don't make much per hour either PLUS they do a very nice job!
I guess I tip generously in general because I just think it's the right thing to do. Of course, we here, make a bit more than the general employee in public jobs. If you tip me, I will love it and appreciate you very much. If you don't tip, I will STILL appreciate you very much!
This is MY thought...
--v