There are some manga that actually end up making super good anime and the anime is extremely worthwhile. I am not a fan of both reading the manga and watching the anime - I like doing both but I won't experience the same story twice. Although some Manga makes really good anime, sometimes it really doesn't and it really needs to be experienced in Manga form.
What stories do you think especially need to be experienced in the manga instead of the anime?
Mine is probably Attack on Titan