The Dodge Ram commercial with Paul Harvey's speach 'God made a Farmer'.
[youtube]http://www.youtube.com/watch?v=AMpZ0TGjbWE[/youtube]
I was on going to go with the Budweiser Clydesdale commercial but the Farmer one has more power in its message of work and family.
[youtube]http://www.youtube.com/watch?v=o2prAccclXs[/youtube]
Worst?
2 minutes of Oprah blabbering on about the military and trying to sell jeeps. LIMP and LAME.