Darker than Black: Kuro no Keiyakusha

Part 1: https://myanimelist.net/stacks/42482
Part 3: https://myanimelist.net/stacks/42551

𝙍𝙀𝙂𝙐𝙇𝘼𝙍 𝙐𝙋𝘿𝘼𝙏𝙀𝙎 | 𝙌𝙐𝘼𝙇𝙄𝙏𝙔 𝙎𝙀𝙇𝙀𝘾𝙏𝙄𝙊𝙉 | 𝙑𝙄𝙎𝙄𝙏 𝙋𝙍𝙊𝙁𝙄𝙇𝙀 𝙁𝙊𝙍 𝙈𝙊𝙍𝙀
Anime where the main character is/was a soldier or has military ties. Stack will also include series where military equipment is used (heavy artillery, firearms, military-grade explosives etc.)

The most popular anime on MyAnimeList as of October 28th, 2007.

Source:
https://web.archive.org/web/20071028015845/http://myanimelist.net/topanime.php?type=bypopularity
https://web.archive.org/web/20071028064628/http://myanimelist.net/topanime.php?type=bypopularity&limit=30

Anime where Yoko Kanno is credited with Music.

These animes are hard to watch for some people. They may contain complex plots, difficult-to-understand concepts, and sophisticated depictions of cultures.

A niche genre of anime where the city/setting is as important as the protagonist to the story.

Often accompanied with a large, fun cast with compelling character dynamics and clashing interests.

Anime featuring music by Visual Kei artists.
Grouped and ordered by artist.

Anime where the main character is a contract killer, assassin, hired mercenary, hitman etc. These series vary in their story although many are OPMC series there are some anime in this list that are more light-hearted or though provoking.

This list will contain series where the main character has A. no emotions B. hides his emotions and/or intentions or C. no response at all/mute. The theme of the list will be mixed so expect some action, comedy, romance, school and many more.

Original sci-fi anime, one entry per series/franchise.

Part 1:
https://myanimelist.net/stacks/46768

Part 2:
https://myanimelist.net/stacks/46791

Part 4:
https://myanimelist.net/stacks/46816

Anime where the main character is or was a gangster/delinquent. These anime will include characters that have a past or active involvement in gang activity whether directly or indirectly. I will also include series that have gang/mafia or delinquent themes. Expect a variation of different themes such as comedy, action, mystery.

Anime where the main character has a sinister appearance and involvement on the story. i.e murder, theft, kidnapping, brainwashing etc.

Anime where the main character is overpowered but you have seen them. This is a list where I guarantee you haven't seen at least a single entry and if you have you and I both need new hobbies.

Anime where the main character is a superhero that fights villains. In many of these series, the main character has a power that their villains do and uses it against them for the good of society.

Anime where the main character isn't necessarily a villain but doesn't align themselves with laws or worldly emotions; They will fight back mercilessly when needed and can use underhanded tactics to complete their goals.

Series that involve assassins/assassinations.

𝙍𝙀𝙂𝙐𝙇𝘼𝙍 𝙐𝙋𝘿𝘼𝙏𝙀𝙎 | 𝙌𝙐𝘼𝙇𝙄𝙏𝙔 𝙎𝙀𝙇𝙀𝘾𝙏𝙄𝙊𝙉 | 𝙑𝙄𝙎𝙄𝙏 𝙋𝙍𝙊𝙁𝙄𝙇𝙀 𝙁𝙊𝙍 𝙈𝙊𝙍𝙀
Anime with the most masculine characters, story or themes. Full of testosterone!