[ Well that's how he is. He thinks of himself as a fair and balanced person to judge characters and calls me a fanboy for still liking Ash to this day, especially in XY. Nothing at all? He denies that anyone can dislike BW or Iris for valid reasoning. Nah, we've all got it covered]
I don't think I have a list of least favorites, but almost every DP filler, some BF episodes, Johto fillers, and some XY fillers and episodes are my least favorite.