I'm a bit late, but I want to reiterate what Alf and JCOnyx have said. Down votes are only to be used for characters who would truly ruin the game for you, not just characters you don't like or that you're neutral toward. Note that it says reasons for downvotes do, in fact, have to be
reasonable. Saying that a character would be too overpowered or underpowered is not a reason, nor is being unable to imagine a moveset. With the very large lists of downvotes here, well, as it's been said -
From an outside perspective, it looks like you guys are just downvoting the other characters to move yours farther up the list, which is why we implemented the explanation rule in the first place.
Now, votes against a character for being in a well-repped series are fine, but it does look pretty bad if you up-vote characters from another well-repped series.
To give an example, something like this:
Skull Kid: Zelda's already got a decent main antagonist fighter
is a fair reason. You feel like the villains of Zelda are well-repped already and don't need any more? That's fine.
Something like this:
and I'm pretty sure most people don't even know what Skull Kid could really do offensively. He's a wizard who runs from fights, not really joins them.
is not. Peach, for instance, is a classic damsel in distress, but she'll beat the crap out of anyone in Smash. And having no idea what moveset they could have doesn't mean anything. Characters like Balloon Fighter and Skull Kid have, in fact, had movesets thought up - very original and fun ones, at that.
As another example:
Toad - He's already with Peach,
This is a decent reason for a downvote. It could influence the moveset of another character, which wouldn't be received well. Some might counter that he could be changed to Toadsworth, but I would accept this reasoning.
and his only talent is picking up turnips faster.
This I would not accept as a good reason, especially since it's well-known that Toad could have many other abilities from unused Mario power-ups.
All that said, just be careful with your down-votes. They're to be saved for characters that would truly ruin the game for you. That doesn't mean they won't be counted or anything like that, but it's important that you really consider if the character is truly worth it.