I can see an argument for 3-2 if you can't/don't want to pick a winner. Especially with Chris' raffle meaning you have to vote every match.
And obviously, if you like somebody more or want them to win more, you give them a 5-0.
4-1 is saying "I decisively know that I want to vote for this person, but I'm going to half ass it so that the person I give the 1 to will like me later"
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http://i41.tinypic.com/xq0ro.png -XIIIiscool's Advent Calendar