Almost any of the drug commercials. Nice, happy music playing. Healthy, happy people enjoying life. And in the background, a non-stop list of all the side effects that can kill you or incapacitate you for life.
The only ones I hate more are the ones for the ambulance-chasing lawyers. I especially hate the ones that begin, "If you or a loved one has been killed or injured...you may be entitled to compensation."
If I have been killed? I guess those TV stations have great signals to be able to reach me if I'm dead.
And I have to agree with "Me Too" about the life insurance policy with Gerber. Geez. If your kid dies, don't feel bad--here's ten grand from Gerber.
Oddly, the Flo commercials don't irritate me all that much. (Mrs. Ten Toes doesn't like them, though.) There was even one where Flo appeared to be getting aroused by a motorcyclist. And my search on YouTube produced this parody: http://youtu.be/OlGW5P97Bv0