Currently, the default sort order for answers is by "Votes". This is simply upvotes - downvotes. It fails to consider the fact that some items simply have fewer votes because they are either newer answers or because they are currently so low down that they never get seen.
I would like to propose that we use projected score instead.
Here's a technical article on how to do that: http://www.evanmiller.org/how-not-to-sort-by-average-rating.html
And here's Randall Munroe (of XKCD) being less technical but more amusing on the subject: http://www.redditblog.com/2009/10/reddits-new-comment-sorting-system.html
Basically the way the equation (in the first link) works is that it looks at how many people have actually viewed something and sees how many of them upvoted/downvoted it. Based on that, it asks the question, if X people saw the item, what would its score be? It asks that question of every item and then sorts them according to that.
So it could see that one answer has 1000 views and 10 upvotes and another has 100 views and 5 upvotes, and it would reach the conclusion that when the second one has 1000 views, it'll have 50 upvotes, and therefore the second answer is better than the first.
Now that I'm thinking about this some more though, I'm realizing that while we're at it, we should factor in when votes were made. An answer that was great six years ago may no longer be great today. Still, I think using projected score would result in better sorting than the current system