Things I've learned from completing these three rankings:
1. Deciding my top X and bottom X cards is fairly easy, but everything in the middle is nigh impossible. I find myself caught in the loop of Card A > Card B > Card C > Card A over and over, and the loops even intertwine to the point that I am utterly baffled as to my own opinion. Nevertheless, I managed to rank them all by what I deem is "best" (most likely to earn you victory in the most possible situations), favorite (the criteria for which is somewhat less focused - something between how much do I enjoy playing this card, how much do I hate losing to this card, how amazing is it when someone actual wins with this card, and a sprinkle of inexplicable bias), and favorite art (a complete shot in the dark).
2. If I were to rank them all again right now, the lists would all look at least slightly different. And I am very happy about that. I enjoy the fact that at any moment, I could play a game of Dominion with a particular card and decide that it is, in fact, much better than I gave it credit for. Then later, I might decide that it really isn't that good after all. This seesaw effect of learning the power levels of particular cards through playing them in various kingdoms is what keeps Dominion at the top of my favorite games list. I have played literally thousands of games, read numerous articles and opinions, and I still feel the excitement of learning the game whenever I approach a new board.
3. Adventures is easily my favorite Dominion set.
4. Claus Stephan is easily my favorite Dominion artist.
I am thoroughly looking forward to the unveiling of the full lists, and would like to applaud Qvist for putting in the time to make this possible every year. This is my first time ranking, but I have enjoyed these lists for some time. Bravo, sir!