Titles that contain characters who suffer from depression would fall into this category if this is of significant importance for the storyline.
Self-explanatory. Series who's primary focus is fighting would fit into this segment. Yu Yu Hakusho and Ranma 1/2 are classified as fighting series. But if you can, then please select a more specific keyword instead, such as "Gun-Action" or "Swordplay"; maybe some day we'll completely split up this category into some more terms of this sort.
Titles that are dismal or gloomy in nature qualify for the dark category.
