Glad you found that place in your life. I haven't listened to any top 40 since I was...like....14. I do listen to rock stations though, b/c I have car with no cd player. Besides which, I'll listen to classic rock any day of the week. Even if it is the same hits over and over, they're still better than anything else these days. I like to keep my music trivia/arcane knowledge up to snuff. That necessitates some radio listening.
Still, I understand and agree exactly with you. It still pays to go on fishing expeditions every once in a while--if you can find a station that plays independent music in addition to some top 40 nonsense... That led to some great discoveries.