If I receive poor service, I tip accordingly or not at all. It is my firm belief that a tip should be based upon quality of services rendered. It would seem tipping is a foreign concept here outside of the restaurant environment.
Thus far, the dog groomer, the window tint guy and the car detailer have all acted incredulous when a tip was offered. The auto detailer (who performed a $250 service for $50) went so far as to say nobody had ever tipped him!
So, am I tipping when I don't have to (or shouldn't) or is it weird for people to not receive a tip in various industries if they do an exceptional job?