I drop alot of anime and that’s usually because it lacks appeal or I get sick of the pathetic protagonists.
My rating criterion is pretty rigid with a lot of shows being rated poorly. This is due to a lack of creativity, terrible plot, and/or characters. I especially hate weak willed characters, but am willing to put up with it if the show offers something to offset this weakness.
This usually takes the form of a novelty or humor. An example would be my rating of the show Kanokon. The main character is lack luster, the characters without depth, and the story is lacking. However, it is rated well as the anime takes an interesting ending approach.
My manga list is way out of date and will probably not be updated. I prefer to use my mangaupdates account to track manga.