In the quiz I got Blue, which up until the recent AvR release I'd say is pretty consistent. Blue in AvR just seems so weak now, with only a few cards working well in decks other than Limited, and most new Blue seems geared towards a specific strategy that just seems needlessly complicated. Again though, before AvR Blue was a color I liked, mostly Izzet (Blue/Red) or Dimir (Blue/Black), and M13 appears to be bringing back a more fun and practicle use of Blue. I also liked playing Orzhov (White/Black), Rakdos (Black/Red) and just plain mono-Black, which has gotten extremely more viable as of late. It doesn't always win, but I find any Black variation to be at least fun to use.