Car horns or sirens on the radio commercials. On a morning commute, either can be disconcerting. Those should be banned!
I hate kissy smacky noises. Slurp, slurp, snort, slurp. Really, like the smell of your own farts, unless it's your own noise it sounds pretty gross. But I guess that's not commercials so much as television. Still, it's worth mentioning.
