Whoa, necrobump to the max.
Guilty Crown has definitely been a season fave. The only turn-off I had was the first few episodes and Episode 12, where everything was a train-wreck. Also, Shu has gone through more personality changes in 20 episodes than I went through in my 20 years of being alive.
Persona 4 has been living up to my expectations as following the game closely, so not much has been lost there. The only problems I have seen with the story thus far is that a lot of things that usually happen in the game, such as fusions or combo moves, are on a large scale unexplained by the anime, and left to the view to find out by actually playing the game. It's just one of those few things that leaves the anime kinda wanting...but I guess you can't cram 100+ hours of gameplay into a 24 episode season too well.
One comedy that has certainly popped up that I've been enjoying lately is Daily Lives of High School Boys. It follows a similar vein to that of Nichijou, but is definitely geared towards the male audience. The Literary Girl gag has been used a lot the past 10 episodes, but the usage of the recurring theme there never seems to die and makes me crack up every time.
Lastly: Mirai Nikki. This anime has certainly been one of the better anime this season, up there with Guilty Crown. The last few episodes have been a bit rushed, but otherwise it has kept me on my toes.
Also: Nisemonogatari has rather been a bit disappointing, I agree, but I think that's because we have a lack of the awesome Senjougahara conversations, which have definitely been overshadowed by the Araragi Sisters arc. So I partially agree with you, Eraddd. As they say though, hopefully it gets better with time.