I watched all of SAO and I watched all of the first act of SAO2, but then I just kinda lost interest. The first arc of SAO was something that I really, really enjoyed as a premise, but I felt that it was really let down by the constant time jumps, and the fact that it was so short of an arc. It never really made much sense to me that the game that the show is named after only gets one half of a series. What I feel really needed to happen was for Arc 1 to span a whole season to allow for more character development and so that we could really get a feeling for the world of SAO, but instead they decided to cut it off and jump straight into the much less interesting fairy world in which Kirito's companion's only memorable trait was that she was secretly his sister/cousin and she had massive boobs. and they made Asuna, Kirito's girlfriend and companion from Arc 1, into a damsel in distress and they stripped her of all of her power.
SAO2 had a good start, and I was really starting to like the character of Sinon, but for whatever reason, the person who started out as a strong female supporting character soon devolved into yet another helpless character that had to depend on Kirito whenever they were together, and could hardly do anything for the latter half of the arc. What I did like was how it tied into Sword Art Online, or at least tried to, but I wish that the antagonist of this arc had actually been in SAO instead of just making him up during SAO2 and then showing a flashback of Kirito meeting him. I then watched Kirito get Excalibur in magical fairy world (AKA Act 2), and then I just stopped watching it.
I have no real need for a strong female character, but you don't build them up as strong characters only to have them stripped of it because Kirito is there (in the case of Sinon) or isn't there (in the case of Asuna). It just seems like they are backtracking on the original design on the characters just to create some form of forced drama.