I have a number of commercials I always watch, even though I have no interest in the products for many of them. The Mac/PC commercials I've already mentioned, but I always watch the "Caveman" commercials from Geiko. I enjoy the "Jack" ones from Jack In The Box, but my favorites right now are the "Messin' With Sasquatch
" ones from Jack Link's beef jerky.
My all time favorite one was one of the 7-Up "Spot" commercials from the '80s. The ending on it was just hysterical to me.