Tenjou Tenge -Some redeeming qualities here and there, but... it doesn't just have a bad story. I refuse to call that trainwreck a story at all. Imagine several fanfics by different authors, none of which had any knowledge of the source material, glued together.
Claymore -It would just be somewhat boring if it didn't have Raki. But it does, and he alone made me hate the whole thing.
DBZ -shitty story, shitty fights, not quite shitty but still subpar characters, except for villains (those are shitty), very slow and generic, ridiculous powerlevels. Epic fail comparing to the original Dragonball.