I would like a "like"/"dislike"/"neutral" rating system.
Yes, this would mean that we'd have to wipe the ratings for all songs, but in the long run I see this as a beneficial thing. And even though all old maps would lose their ratings, on the positive side this would give users the chance to go back and change their votes on those maps which they might have voted badly on before. And since the database can now store who voted what people could then change their votes on all maps if they change their mind later on.
Edit: Also at the same time ratings should be made map specific, not song specific. I remember songs where I absolutely hated one map while I loved another, and I just can't make a vote that makes any justice to both.
Yes, this would mean that we'd have to wipe the ratings for all songs, but in the long run I see this as a beneficial thing. And even though all old maps would lose their ratings, on the positive side this would give users the chance to go back and change their votes on those maps which they might have voted badly on before. And since the database can now store who voted what people could then change their votes on all maps if they change their mind later on.
Edit: Also at the same time ratings should be made map specific, not song specific. I remember songs where I absolutely hated one map while I loved another, and I just can't make a vote that makes any justice to both.