The commercials that I've linked above are some of my favorite ads because of the impression that they leave on a viewer, but neither are my favorite ad campaign. My favorite would have to be the Art Institute commercials.
The Art Institute ads are very well done, in my opinion. The way that they take out aspects, like the food or dress or interior design features, and fill it with white draws the viewers eyes and attention to that object. It makes the viewer wonder, "What should be there, what if it were like this?" And that is exactly what the ad is meant to do.
Not only do the ads make one's creative juices flow, they also show something that most people don't often think about or realize: Opportunity. The ads draw attention to just how many opportunities are sitting there waiting for someone creative to make something amazing, whether it be the images on a screen or the images in Times Square; the food you eat or the clothes you wear. I think that the commercials really show that there really is something that you can do with your creativity, and that opportunity is just waiting for you to take a chance.