gundamv, I have always found it remarkable how open minded Anand is. Anand is the most flexible player ever in terms of adjusting to the needs if each type of position. He also has incredibly quick calculation. Those two things together give me an image of someone who sees everything clearly and very fast; it is as if Anand has some sort of Super sense of Chess Vision.
Regarding the style of game which typically has resulted from Anand's play, he is active and dynamic.
Since you seem to be getting at something about the match versus Carlsen, it should be said that Anand was tentative against Carlsen, and Carlsen snuffed everything.
How would you describe Anand's style prior to his World Champion match against Carlsen?