I have no issue with filler as a concept but, If you put a filler episode during a filler arc during the climax of the main arc, rethink it.
Someone saw One Piece and said "I like this but, why do we need all this character development?"
Kiss x Sis (TV)
No one was forcing me to watch this. I need to get my life together.
Spider-Man: Into The Spider-Verse
Honestly this is one of, if not my favorite animated film of all time.
A case of the dub cast just having some fun with a kinda crappy show. Couple jokes miss the mark here or there but, overall some fun stuff.
Avatar: The Last Airbender Book 2: Earth
Introduces the most badass blind character in the history of badass blind characters.
Bebop is a show I will never tire of. The episodic nature gives us the chance to see the cast in various situations and works in its favor.
Mob Psycho 100
Unique animation style, well written characters and a killer soundtrack. This checks all my boxes.
Attack on Titan
My big issue with this one was with the tone. The facial expressions and reactions were the same for fart jokes as they were for the Titans.
Hajimete no Gal
The dub has quite honestly taken this show from pretty shit to one of the funniest things I've watched this year.