The barista is in this case since she is allowed and chooses to add a personal touch. By not adding the personal touch its also a form of expression. Either way, the personal touch will have a direct effect on the enjoyability of the coffee.

Personal touches in programming are rare and often bad. Going past "good enough" is rarely considered art as its done for code cleanliness or efficiency.

I would never hire a programmer for funny comments. I might hire a battista for her art