For those who care, I rate songs using the following criteria:
***** I immediately want to replay the song. (Look, this isn't Facebook where every app gets 5 stars!)
**** I would want to hear the song at least once or twice per day on the radio. Or it would make it onto my mp3 player.
*** I would have a 50/50 chance of stopping to listen if the song was playing. Over half of the songs on a (good) Christian radio station or even a secular station fall into this category, so it's not meant as an insult. It's just not my thing. (I'm pretty liberal on giving songs a chance so a lot of "if only" many songs fall into this category - you know, if only the recording quality wasn't so rough or if only the vocals were stronger or if only the music wasn't obviously a programmed machine playing, etc).
** I would be pretty likely to change the station immediately on hearing the song. Bad production values put many songs into this category.
* I would only continue to listen out of morbid curiosity because it's so bad, it's good.
(I try to imagine a Christian radio station that would play the genre of the song even if it's not something that would get airplay on most CCM stations - and then evaluate the song based on that imaginary station).