I agree completely with the sentiment that the perfect MAC customer - the perfect ANYPLACE customer - is one who has manners. "Thank you" and "please" and "no, thank you" and "have a nice day" are not painful to say, and whether you spend hundreds or nothing, they are the best parts of my day.
I had a woman run me ragged for a $200 sale - she was mean, nasty, bossy, pushy, and condescending. She upset me so much that if I weren't going to get fired for it, I would have told her I didn't want her business and she should go somewhere else. (Of course, she told me to "thank" her friend in another department for sending her to me. Oh- I'll thank him all right!
)
Meanwhile, just after her I had several groups of teens and adults come in and all were just browsing and chatting - all were friendly, polite, courteous. Those customers were dreams and I don't mind them coming in all day, every day even if they never bought a single freaking thing from me.
Of course I want to sell makeup, but I'm going to sell makeup no matter what, even if I just stand there. There is no excuse for rudeness, poor manners, or a condescending attitude. And that applies in all manners of business- not just retail cosmetics sales.