My favorite January MC was from 2007 with the Gifts of the Goddess. This MC is my favorite was because of all the different poses that came with that item. It was one of the first that was so versatile. My favorite particular pose was the capelet that had the birds taking flight in the background. I still believe that Jan 2007 was one of the more beautiful of MC releases.
I would have to say that the Masterpiece is my fav. The white skin is useful at times and it saves times rather than collecting white ink bottles. Other would probably be the Angelic Parasol... Why? Because it was the first MC I ever bought.