TOD:
I, too, fondly recall the Helm's truck. I have no such memories for various other trucks, so I don't know exactly what it was about the Helm's truck.
I liked glazed donuts as a child. Many years ago, when I cleaned up my diet, donuts went. Some foods, such as ice cream, returned (my downfall weightwise and cholesterolwise), but not donuts. But then, I've never had homemade ones.