i choose these:
most dramatic moment: the jennifer vs. justine US Open semifinal...so tense and tight and really good tennis too
most significant moment (tennis-wise): serena vs. jen US Open with the bad call...because it led to rule changes!
most significant moment(s) (off-court wise): (a) maria winning wimbledon=most endorsements EVER
(b) serena winning the "serena slam" which elevated her to the status of all time great and she really helped rekindle interest in tennis
It will always be Arantxa, hall of famer! and martina hingis and kim clijsters - amazing legends
ana ivanovic and the italian girls, especially pennetta (forza azzurre! RG CHAMP FRANCESCA AND FINALIST SARA!)
aga, vika, sam, na in the next tier
NEVER say "I don't care who wins, I just want good tennis"