I have to counter the idea that Kate is a simply purveyor of the twee or the ethereal. The more difficult side is that she does display distressing aspects of the Performing Arts, and I hate those people. I wonder if living in post-BRIT School Britain has led to the ludicrous over-inflation of her reputation along these lines: the dominant mode in modern pop is the Stage School approach.
I also remember David Toop saying that using didgeridoos in 1982 was lame and her reputation for experimentation was dubious at best (I think this was the gist of it).
It is never good when somebody is being strange for the sake of it, but I often think that Kate Bush, at her best, is striving for a very vivid kind of clarity, simply her own way of articulating ideas.
This is an amazing song about nuclear holocaust, only Threads was better: