I suppose if you're going to personify death you might as well make it human. But I'm not sure I like it.
I think that Liesel wrote it, actually, under the character of death, but I don't care enough to go back and see if there's anything she had no way of knowing. The narrator seemed to me to be entirely human; you would think that death would have a different perspective than the person whose life it is narrating, but I didn't see that. If it was truly meant to be death narrating, I think it was rather poorly done. And if it wasn't, I still don't much care for this book.