The Budweiser "This is Budweiser/This is Beer" song commercials. So annoyingly sentimental and phony-anthemic. I can't stand commercials that are so cynically calculated to make the viewer feel all warm and fuzzy about something or another.
One of the tricks of the ad trade that I've noticed lately is that they'll have somebody speaking while looking directly at the camera. And then, (and it's very obviously scripted) the person pauses and looks off to the side for a moment, then their eyes snap back to the camera and they continue. UGH!
There's one financial services company (can't remember which one) who's commercials parade these sun-splashed clips of 40 and 50-somethings hanggliding, kayaking, etc., accompanied by a voice-over heaping praise upon this age-group for their history of sticking it to the man or doing things their way or never settling for second best or whatever. It's such transparent flattery that has little to do with the reality of the lives of the people that the ads are geared towards.
Lexus commercials, with their barfy-sophisticated voice-over guy. They make no attempt whatsoever to disguise the snob appeal. They just pour it on!!
Jewelry commercials. All of them. I pretty much avoid the local AM sports radio station for the entire month of December because of them.