Sites like Issues 2000 or Vote Smart show the policies of each candidate and let you pick the one that you prefer. I'd like to see a site that worked in reverse - by asking questions to define your own views, then showing how candidates line up against your own opinion on each topic. This would suggest parties that should be supported as representatives of your own points of view, rather than letting you pick which fan club you should join. It might also help to illustrate the main consistent differences between party policies, and suggest reasons to start political groups of your own.