Naruto F
So I finally read up the recent chapters, and what do you know it's shit. The backstory in the recent chapter was somewhat interesting but nothing else was.
Bleach F
Hitsugaya battle arc. Great way to put me to sleep and make me wish I was reading a better manga.
One Piece B
Great backstory, though it probably won't be the last (there's still a lot of stuff that needs to be explained). Is it just me or are these One Piece backstory segments getting darker in theme with each arc? Fishman Island was focused on prejudice and slavery, Punk Hazard was about kidnapping kids and experimentation on them, and now we got a systematic takeover over a peaceful country killing off all the royalty to be put under the tyranny of Don Flamingo.