Pat I have tired that, but find I spend a lot of time second guessing myself. Different strokes for different folks.
You are right, it probably is a case of different strokes for different folks and it can be a bit time consuming. Nevertheless, I think I find a few inconsistencies each time although I rarely vary my votes by more than 0.5 and never by more than 1.0. I'm not indecisive, am I? It does help to have the votes sorted by rank - the question I ask myself is"Is this image better or worse than the others in the same rank?"