A lot of people do not like filler storylines that the anime studios created to wait for the source material to catch up. The main reason for that is because it does not have the author's touch, so it just feels boring, dull, and too generic. I feel the same way, to some extent. However, there are some exception to this for example the Zanpakuto filler arc of Bleach animes but that one was also with the help of the authors. What about you guys? Do you personally have any filler arcs that you like or do you not have any problems with fillers at all?