anime, it usually ends up being better because we get more scenes and added extras that couldn't be added in fights. I love both though, the manga is more intense because we have no idea what will happen next though!
1. I hate how the art is constantly off in the anime.
2. I hate all the filler,flashbacks, and general stalling to make the episode longer. The only filler I like it when they elaborate upon fights.
3. I hate not knowing, so the manga is an immediate source of information.