-The Plavix ad where a doctor launches into a diatribe of side effects
-Are we there yet? (Mantra by the Simpsons, ad for 6 Flags)
-Any of the "Head-On" commercial family
-What's in YOUR kitchen?
-Stanley Steemer (personal peeve is seeing commercial names misspelled for novelty)
-Closet World (not only the lame jingle, but the horribly animated robot that dances above their name...I mean, he doesn't even keep time w/the jingle!)
I can list dozens more, but will end on an up note of sorts. Although I'm tired of the "Hello Goodbuy" jingle, I enjoy the visuals of most Target commercials. No other department store comes close to their stylish edge.