Around half of my t-shirts have sayings and/or pictures on the front or back. Professional rodeo events, Classic Rock Groups and even a BassPro t-shirt. Only have one baseball cap that doesn't have anything on it and wife and I have numerous baseball caps. Her ex-husband didn't like her wearing a baseball cap, but I absolutely love it.
I have two. The first was a going away present from the Logistic Management group at Gunter AFB (now Maxwell) one summer. Much of my job involved a computer program to simulate dispensing of jet fuel (gas) on the base. The second was from a little family owned restaurant in rural Georgia, even older than the first shirt, but coincidentally the same style and color. Nothing special.