Jingles. As annoying as they are, they are genius. For example, who doesn't know the Mr. Plow jingle? It's not even a real commercial!
The reason I find them genius is the reason I find pop songs genius. There is a certain genius to be able to write a song that half the population hates, but everyone knows the words to. Jingles are the same thing. For example, there are various websites that occasionally post commercials from the 80s or 90s, and it AMAZES me how i still know the lyrics. Like why do I know the Big Red song? Or Crispy Critters? Why is that still in my head!? See? Genius.