Controversy? On this subject? I couldn't imagine it. Was that your intent? Differences of opinion? Assuredly.
I'm with getut. He speaks well for himself and did a good job of commenting and answering.
My addition is: knock yourself out with whatever works well for you and makes your situation best. Feel free to let it go at that. Personally, I have no interest whatsoever in being friends or chummy with the mechanic or, especially, the salesclown, unless they want to make me feel friendly. For crying out loud, I'M the one with the giant wad of cash, that I went out of my way to walk through their door to unload. Furthermore, I don't want just any wrencher messing with my equipment. I've already made repairs that were covered under warrenty just so I didn't have to haul my rig to town and wait and wait and deal with a serviceclown. If and when the time comes that I have to break down and have somebody do what I find I am not capable of, I'll seek out the best person for the job and pay them what they are worth.
In case there's a survey going, I don't need someone else to cook my food (I live alone) so, going to restaurants is something that is a treat, you might say, and I do tip, in proportion to the service rendered. Maybe 1%, maybe 30%. It is not my prob if service personell in a tipping job can't get a job that pays them straightup for their services. And, I certainly don't pay someone to simply recognize me and be receptive and cheerful when I walk into a business. Though, I will admit that may be a pleasurable plan when visiting certain places with a lot of girls in it /forums/images/graemlins/wink.gif
Cheers!