Angry Grimace
Two cannibals are eating a clown. One turns to the other and says "does something taste funny to you?"
Not really a fan of them either and they seem like they are just there so Ishida can be in the spotlight again.
With that there are a handful of them I have some interest in seeing so I should get some entertainment (currently shown ones are no where on that list so they can fuck off)
Almost all of them are pointless no-personality characters that seem like they exist to inhabit some random character designs Kubo made. I mean, the difference between say, Grimmjow or Ulquiorra and virtually any of these guys is pretty big. Sure, you can tenuously tie them to the previous storyline arcs of Bleach, but to repeat myself, its tenuous at best to say these guys have some kind of place in the overall storyline.