Well ive pretty much loved everything about it. Arkham City looked great, Batman's fighting felt just as good as before with some nice additions to the quick use of gadgets, the boss fights were much better and less tedious that Asylum as well. Catwoman was a nice addition to the game but her second and third missions felt like they should have been a lot closer together or at least have an additional one inbetween. Some great cameo appearances and the side quests have been good. I will slightly agree that there have possibly been too many villians popping up but with the nature of Arkham City it makes sense so it didnt ruin anything for me.
This game is definitely game of the year contender for me.