With the last cover from the run being revealed, let's talk about our favorite cover from the run. There are 36 covers from Chiang (he made all but the villain's month one). Unfortunately there is a limit of 15 options on the poll, so I guess we'll have to reply with the answers.
My favorite is issue #17. Chiang did it based on a fantastic unused cover for issue #0 and it got even better. The layouts are stunning.