Ill be honest here.
Since the start of the show, I really didn't want to like Sinon. It just seemed like putting a new female main into the SaO universe was a betrayal to the entire first season. But now that the show has progessed, I've begrudgingly come to like her more and more. I almost feel dirty, because I really liked how SaO (the first arc) made Asuna and Kirito into a great team and couple.
Now I want Kirito x Sinon