Don't come back with you rank all the candidates BS Hugh. If I think Dubya or Jesus is not worth my vote/preference, I should be allowed to deny it to them.
that's what preferential voting is. The system of preferential voting insists you rank all candidates. Optional preferential voting also exists, where someone can choose just to list one candidate and then either have their ballot exhausted when they are eliminated, or follow a pre-determined order of preference that candidate chooses.
Preferential voting is the best system. It's the most democratic, it's very simple, etc. Add a secret ballot, and institute true preferential voting, and Atlasia has the best system of voting.