Pandora is losing original content much to my chagrin. More and more, they're playing songs that are NOT the original recordings. The songs are re-recordings and I detest those songs. If I can't hear the original, I don't want to hear it at all. So, I've been leaning heavily on the thumbs down button. One day, I'll go to a station only to find silence
Anyway, for whatever reasons they're doing this (copyright issues, higher fees, etc), I'll have to live with it since I still like the free service.
Mini rant over