My notes are kind of all over the place; I was making them as I was listening. I have a few points.
First I want to comment on the response of Paul Thomas to a question about voter apathy. I don't think it's enough to talk about mandatory voting and accessibility. Carlos Sosa touched on it. Poverty is a big problem. People in desperate circumstances are worried about immediate needs: food, clothing, shelter, or some means of escaping the mental and physical anguish. This needs to be addressed first, and then literacy, teaching people what governments and elections are for and why they should care. You talked about a decrease in participation, and I think it's partly due to the increasing problems of poverty and illiteracy. It's no accident that revolutions aren't started by the poor.
I have another concern. It's the influence of corporations over government, especially corporations that undermine our social, health care, and welfare systems, and destroy the environment. I would hope that some form of proportional representation would mitigate those kinds of problems and the negative effects of corporate influence.
At any rate, I would feel somewhat re-enfranchised...and I think such a system would make politicians less inclined to abandon their partisan ideologies, racing toward the centre in order to attempt to steal votes from rivals.