AS you will realise, I am a positive opponent of the proposed AV voting system.
I believe that one of the most telling arguments arises from the situation when the initial leader of the first- past-the-post-system is overturned by the individual who came second or third.
This must mean (for example) that the second choices of the electorate of the least popular candidate are given equal weighting to the first choices of the electorate of the most popular candidate.
In my opinion, this is grossly unfair. Apart from its extra complexity, AV is thus an unfair system.