I've seen a good bit of debate on Kbin surrounding downvotes, so what are your thoughts? Should they exist? Should they be shown separately? Should you be able to see who downvoted?

I personally like downvotes and especially like that they're shown separately. You're able to get a much better idea of how people feel about something, and you can more easily express a minority opinion. Of course, there are downsides (e.g., brigades), but I think the pros outweigh the cons.