One common theme is the 'opposites attract' concept. Given sakusa's quiet and clean - freak nature and atsumu's more energetic and sometimes messy personality, this contrast often forms the basis of their relationship in fanfictions. Another theme is their mutual growth. They help each other become better players and people in many stories.
One popular type might be the ones that focus on their rivalry turning into friendship and then something more. For example, there could be a fanfiction where they start off competing for a spot on the team but gradually realize they have a deeper connection. Another could be set in an AU (alternate universe) where they meet in a completely different context like at a music concert and their relationship blossoms from there.
There are many out there. 'Opposites Attract' is a really nice one. It delves deep into how sakusa's reserved nature and atsumu's more outgoing and flamboyant personality play off each other. The fanfiction does a great job of creating situations where they have to rely on each other, leading to a beautiful relationship development.
Some Tumblr blogs also post or recommend Haikyuu fanfictions. You can search for Haikyuu fanfic blogs and then specifically look for Sakusa x Atsumu stories on those blogs. The bloggers often give a little summary or their thoughts on the fics, which can be helpful in deciding if it's something you'd like to read.
Manga Town might have a unique collection of manga titles or a different user interface compared to others. Maybe its update frequency or community features set it apart.
The Jeffrey Dahmer political cartoon might be used to raise awareness about the crimes or to critique the justice system's handling of the case. It could also be a form of social commentary on related issues.
Maybe 'money cartoon black' means a cartoon about financial matters with a dark or mysterious tone. Or it could be a style of cartoon where black is a prominent color and money is a central element. But it's hard to say for sure without more context.
A good yuri manga usually has strong emotional connections between the characters, beautiful art, and a story that makes you feel invested in their relationship and journey.