I have a family member who worked in a Hallmark store when they launched a custom card printing service (in-store, select the cover art and write your own message, printed on a card).
She says that about 75% of the custom card customers would ask her what they should write for a message.
She wrote messages of friendship, love, birthdays, graduations, congratulations, sympathy, etc. To support her coworkers on other shifts, she filled an index card box with several dozen canned "custom" messages for Hallmark customers to choose from.
Somewhat separately, she reports that working at Hallmark is a good way to make a misanthrope out of an intelligent teenager. To which I reply that most of the intelligent teenagers I knew were already misanthropes! But the stories she tells, particularly of Christmas ornament hysteria, are hysterical.
