It's come up in the comments, so I thought I'd share with you my byzantine and ridiculous scoring rubric.
A number one vote netted that character 25 points, and second place 24, third place 23 and so on and so forth all the way down to a single point for a last-place ranking. Which is really neither byzantine nor ridiculous, really.
More DC lists than Marvel were submitted, but the Marvel lists produced way fewer orphans - that is to say, characters that appeared on only one list - so the low end of the Marvel list tends to outscore the same positions on the DC one. The DC scores ended up way, way more top-heavy.