You've gotta be cruel to be kind in the right measure?

I admit Led Zeppelin could be overindulgent. I admit they way they went about covering certain artists/songs was wrong (though I could never know what their thinking was and don't think it demonstrates a lack of creativity). Yes, I know Jimmy Page was sloppy. Yes, I know Robert Plant sometimes sounds like a whiny girl. And their lyrics were rarely profound. There are probably more things I'd acknowledge if I could think of them at the moment.