I've always liked the system of proportional representation, but I'm unsure about it. It gives too much power to political parties, for one. I always feel that it might be better that all localities get some form of representation in congress. Mixed-member proportional representation, to me, sounds like the best possible model. Carries the benefits of both PR and FPTP.
I love our current system, but if we must change, I agree with this. It gives a better scale of popular opinion and makes room for third party/independent candidates.
