I have always liked the trio in both manga and anime versions and I have to agree that Watanabe is a great twist on a over done akward guy cliche. As the most 'normal' guy it is a surprise his mind coped till now and  I am eager to see what is next for him. It must be very hard for him to sorta lose Iwata as a flesh punch bag as an outlet as well as his 'love' but I think too many brain breaking things have occured for his 'normal' mind. I might be odd but liked the 'old' Watanabe, though ch19 has gold in.