The Ronald McDonald commercials of the 70's and 80's were fun. (Who's the McBravest McClown of them all...) with Mayor McCheese don't you know!
The decades long Tootsie Roll commercial ("Mr. Turtle, how many licks does it take to get to the center of a tootsie roll?" "I've never made it without biting. Ask Mr. Owl." "Mr. Owl, how many ..." "Let's find out. A one. A two hoo. A three. *Crunch* Three." "How many licks does it take to get to the center of a tootsie roll. *Crunch!* "The world may never know.")
And the other one from the 80's - "Whatever it is I think I see, becomes a tootsie roll to me."
The 70's Reese's peanut butter cups: "Hey you got peanut butter in my chocolate!" "Well you got chocolate in my peanut butter!" Both: "Mmm. Delicious!"
The Sunkist rendition of The Beach Boys song: "I'm drinking up good vibrations..."
Oh and back to McDonald's for the 1974 debut of the Big Mac : "Two all beef patties, special sauce, lettuce, cheese, pickles, onions, on a sesame seed bun!"
And the tic tac commercials of the early 80's : "Put a tic tac in your mouth and get a BANG out of life.."
And also in the early 80's I liked those Dodge truck commercials that kept showing the two rams locking horns: "Dodge trucks are ram tough *Rams bump horns* "
Oh and the Chuck Wagon dog commercials where the dog chases the little man with the horse and buggy across the kitchen floor was cool.
Finally ,for some trivia, which commercial said, "Sometimes you feel like a nut. Sometimes you don't. [The next line would give it away] "