What is it about radio adverts that makes them so painfully bad?

I've never been involved in a radio campaign - we leave that to the advertising bods - so this isn't me speaking with any kind of authority...just as a Dubai driver that spends a lot of time in my Jeep with only the radio and a world-class display of bad driving skills to keep me entertained.

There are so many that I would like to make tribute to, but I'll keep it to the top offenders that spung to mind this morning.

The shortlist of joint winners for most annoying are:

>> Air Arabia, where the voiceover changes not only mid ad, but mid sentance. A young high-pitched girl with an American accent says "The food is good but I'm not a big eater..." "....so why should I pay for more than I want?" continues the smooth voice of a middle aged British woman. Seamless! (not to mention really pathetic scripting)

>> Etisalat, boasting it's "official" partnership with Barcelona football club, apparently values the relationship so highly and is sooo closely integrated that it has renamed Barcelona's world famous Neu Camp stadium to Camp New. If ever there was a proof point of a close partnership, this clearly isn't it.

>>Anything that is sponsored by du du du du du du duuuuuuuuuuuuuuuuuuuu

>> One that recently - thankfully - departed our airwaves: the Al Agria ad for Cirque du Soleil. Not only did the ear splitting 3-second music clip have me reaching to change channel every time it was played (at every ad break on every single sodding station) but the guy that they interviewed to say how fabulous it was had clearly been dragged there by his wife and managed a distinctly unenthusiastic "It's nice, yeah. I've seen it twice now". Wow what a testimonial, pass my my credit card immediately.