Notes:

Right here.

How it works is, the webpage shows you two characters, and you just click on the one that you like more (or click on "tie" if you can't decide between them), and as you go through all the different combinations of characters, it creates a list of those characters organized in order of your preferences, which you can see once you're done.

It only takes a minute or two. Give it a try, if you're curious. Try not to spam the "tie" button though, or that completely defeats the purpose of this thing. You really should only hit it if you just absolutely cannot possibly choose between those two characters under any circumstance.

Oh, and there's one for Awakening too. But it's not as good. It works pretty much the same, but there's no pictures, only names. And there's no "undo previous selection" button either. No filters either. You have to do it with all the characters, male and female alike.