most people seem to like having a bicameral system with one house one seat per electorate and one house bigger electorates with more seats
the 1:1 bit if you dont have preferences then say 5 parties stand and get about 20% each, 4 could be one way ultra right/left and the 1 thats opposite/different could have slightly more votes than all of the others leading to an elected representative most of the voters didnt like
however with preference flows that are arranged in backroom deals and candidates standing for basically fake parties on small issues you can have people voting for people they didnt intend to vote for, if you dont have to vote below the line (in australian parlance meaning number each candidate)
then for the multi seat electorates the more seats you have the lower a quota is
voters/(seats+1)=quota
(also an issue with mandatory or optional voting and invalid rates, and whether you need a quota based on who did vote or who could vote)
anyway if you have a 100 seat electorate youd get a lot of fringe special interest candidates with about .5% of the vote standing for things like
pirate party
more beer party
shooters party (would be NRA equivelant)
watermelon socialists
religious parties
nationalist parties in the uk, protestant irish, catholic irish, scottish nationalists, welsh nationalists (i know they exist but dont know how popular they are)
basically theres probably a party you really really disagree with, and the lower quotas get the more likely they may win seats, the balance of power, or wind up in a coalition government
but if you dont have small quotas then large chunks of the population dont really get anyone in parliament pushing their viewpoint
the EU seems to have a system where you need to pass a percentage to either get bonus mp's or any mp's to begin with
other interesting things are if someone ceases to be an MP who is the replacement
byelections, government apointed, party apointed, next highest on that ticket (for multiple seat electorates), next highest votes
heres an article by one of the election analysts in australia:
http://www.guardian.co.uk/...-misrepresented-av-debate
this seems like a better real explanation though:
http://gowers.wordpress.com/...0/is-av-better-than-fptp/