I knew I overtipped when a waiter followed me out into the parking lot, and thanked me for what I left. I do know that now I look for a merchant's name more than I did before when an item comes up for sale. This is partly because I recognize someone who does work I like, but also because I feel as if I have more of a relationship with some merchants than others. That little note helps a lot. One vendor, now modeling in the heavens, would even write me when he saw I had used his models in my graphics in the gallery (when I still had one) or in a forum, and that meant a lot to me (not that I thought I was ever such hot stuff in doing the graphics, but that he noticed and commented sincerely). His like will never be seen again, I don't think.