I know, all the ads in this section are technically supposed to be "tek's favorite commercials." But this page is for the best of the best, IMHO.

In alphabetical order:
AT&T (Pure Imagination); AT&T WorldNet (Walkin After Midnight); Geico (do dogs chase cats?); Got milk? (Aaron Burr); Heineken (The Entrance); Oil of Olay (Bugsy Brown); PBS; Rice Krispies Treats; Samsung Galaxy Gear; Sprite (Sun Fizz); Travelers (umbrella); Verizon (Susie's lemonade); Wheat Thins (night vision goggles)

There's also an ad for Pepsi I couldn't find on YouTube, so here's a link to Retro Junk.