I feel what your saying, as too many have said such, better off listening to your own playlist via some sort of mp3 - I'm sure it isn't too hard to get a stereo/data input of some kind for car audio these days. I hope those vehicles fitted with Ipod docks also have an alternative USB backup for those not wishing to pay for another monopolistic system.
Personally, the only radio I do listen to is Radio 4 (BBC) and occasionally Kerrang until I get 'repeatitus' or bored.
'Comercialised radio' has gone the same way as digital/cable tv, multiple loops of the same often repeated shows, with few new content and extra boredom added, but with some good 'jewels' to be hunted for amongst tha vast amount of trash. ...sort of like using a search engine then