As for personal preference, I really don't care for the urban or new country channels (i do like outlaw country though).
For channels I listen to, I would have to say Classic Rewind, though the playlist has gotten deeper so I can tolerate it a bit more though. The whole reason I never listened to that or Classic Vinyl for that matter was they were the same as the awful FM Station here that plays the same 150 classic rock songs over and over. I mean, I'm from Alabama (and Muscle Shoals for that matter) but even I'm tired of "Sweet Home Alabama" over and over again lol
The worst channels to me are any single artist channel and Escape. Escape was listed as something to listen to instead of Moving Easy now that it is gone. Sorry but Escape is nothing but friggin elevator music. Puts me to sleep. It is a crappy substitute for Moving Easy.