Why is Ichigo always in Shikai mode? Other shinigami are always in normal mode, and then when needed, transform into Shikai or Bankai modes. But as soon as Ichigo leaned Bankai mode he never went back to normal mode. Or maybe he is always in normal mode and he always skips Shikai and goes straight into Bankai mode? Why is he different?
According to the Bleach Wiki,


  Yoruichi Shihōin has stated that his Zanpakutō is a full-time released form type because of Ichigo's vast but uncontrollable spiritual energy upon generation of it, implying that it is simply a type of Zanpakutō that, without proper control of his spiritual energy, once in Shikai form, remains in said state.