Vika's best is every one with long sleeves, my absolute favorite is the one in my avatar - She just looks fierce.
What's so fierce about that? She looks like she's going surfing... She didn't have many memorable outfits this year as in my mind they just kept changing the color of the same top with those shorts. I guess the Olympics' one was her best.
Serena's best was easily the Olympics one, followed by Roland Garros. Her USO dresses were terrible.
Maria's USO dresses were both great, as was the Roland Garros one. Olympics was fine too. Wimbledon was horrible, it didn't even fit her.
Wozniacki's USO dress was one of the best I've ever seen actually.
Re: The best and the worst 2012 outfits of your fave?
I usually don't care about my faves outfits, I pay attention on outfits only if I don't care about the players. But looking at the OP, my fav was Sabine's (and Görges's) Olympic outfit. Nicely reminds of German football outfit.