Trouble is, with PR, we'd have even more hung parliaments and coalitions, that said it has sort of worked for the the Germans who always have coalitions governments.
With FPTP people vote tactically which is why you get such distorted figures. I would be surprised if, come a PR election, UKIP got the same share of the vote as they did now.
STV/AV is a complete no for me, I want who I voted for to come into power, hot my 5th or even 6th choice.
Come PR people would ask "Who would you local MP be?", but do any of the current "local" MPs actually do a lot for their local constituents?