My all-time Top 5 favorite superbowl commercials:
ETrade's "Uncensored" Ad (2011)
Doritos' "House Rules" Ad (2010)
Budweiser's "Wassup" Ad (2000)
Google's "Parisian Love" Ad (2009)
Apple's "1984" Ad (1984)
Last but certainly not least, the 1984 Apple superbowl commercial. This came out the year I was born so obviously I watched it a lot later ;)
Apple does things big and this ad was the start of it. The company brought in Ridley Scott to direct this ad that makes analogies to George Orwell's novel "1984." All of this was to promote the Macintosh computer and it was a gamechanger in the ad industry.