Your point is well taken. I suppose it doesn't bother me nearly as much when I believe that the author did it intentionally but not gratuitously, or merely self-indulgently. But that's *me*. The truth is, I want the author to stick with one. Write a little more convolutedly if need be, but in my own life I can only ever know what I think and experience, so that's what I want to read. Others obviously feel differently!