I'm wondering if Ichigo's mother was actually a hollow... except that we've been told she was human, and killed by Grand Fisher. It was hard for me to believe Fisher was her real killer just because Isshin seemed so indifferent back when he finished him off, not sure what to make of it. But it would explain Ichigo's weird duality. Actually, question:Was Zangetsu saying that he, Zangetsu, has always been half zanpakuto and half hollow? If that's the case then maybe my guess is correct, unless I'm wrong and Urahara himself performed hollowfication on Ichigo when he was in that pit.

I'm guessing that maybe Gin never had the chance to put his hand on Aizen's sword without raising suspicion until now. It would have looked obvious to try that move back before Aizen went through his first evolution in the fight with the others. At this point I can't tell if Aizen really did know that Gin was going to make an attempt on his life, or if he's just a verbose bitch.