Look, if I only go thumbs-up on Broadway and Disney songs on a station that may or may not have started with "Drink With Me" from Les Misérables, I do not want random indie/folk/Jack Johnson crap. I may have a secret shame, but it's not that bad.
Also, stop trying to make me like it. There's a reason every one of those songs has gotten a thumbs-down, and it's partly because I don't want to hear it right now, but mostly because it sucks. So don't put on another song exactly like it. Your mission is to give me music I like. And if you're wrong, suck it up.
And I have discovered new things. Before Pandora, I didn't know any songs from Oliver!