Re: Which is Serena Williams's best season so far? 2002 or 2012?
No way is Serena better off the ground now. Back in '02/03, her shots had so much leverage, huge thudding power complimented by great width and accuracy. Just look at the US Open final of 2002- she made Venus look underpowered and slow, such was the sheer insanity of her hitting.
Nowadays Serena is certainly more inventive on court, and can probably gage the tempo of a match much better. Also she has refined her serve to the extent that it becomes borderline unplayable when serving over 60%.
Movement wise, she's nowhere near the athlete she was 10 years ago. But that's to be expected obviously. What Serena has done is adapt completely to the changing conditions and limitations in her game, and that is the proof of an enduring champion. Making compromises, but not at the expense of limiting your results.
As for the question, 2002>>2012.