Well, in some bruce hits tony fanfic, it might explore a scenario where there is a misunderstanding. Bruce hits Tony out of anger because he thought Tony was behind some scientific mishap that affected Bruce's work. But as the story unfolds, they find out it was all a big mistake and have to deal with the consequences of their actions and repair their relationship.
You can try fanfic websites like Archive of Our Own (AO3). It has a large collection of fanfics, and you can search for 'bruce hits tony' specifically in the search bar. There are likely to be many different interpretations and stories there.
There's no way to tell just from the title whether the 'bruce hits dick fanfic' is popular. It might be popular among a specific subset of fans who are interested in the particular relationship between Bruce and Dick in whatever fictional world they come from. However, it could also be relatively unknown if it hasn't been widely promoted or shared within the fan community.
Since I'm not familiar with the 'bruce hits dick fanfic', I can only guess. It could be part of a fan - made narrative that explores the relationship between Bruce and Dick in a rather intense way. It might be written by a fan who wants to create a dramatic moment between these two characters, perhaps to explore themes of rivalry or betrayal. The 'hitting' could be a physical manifestation of some deeper conflict in the story.
It might not be that common. Usually, fanfics tend to focus more on positive interactions or team - up scenarios between characters. Hitting is a rather negative and extreme form of interaction, so it may not be as frequently explored in fanfic writing.
One possible theme could be the breakdown of the mentor - mentee relationship. If Bruce were to hit Dick, it would shatter the trust that Dick has in Bruce as his mentor. Another theme could be exploring the consequences of extreme stress or a dark turn in Bruce's character.
In the 'tony hits peter fanfic', it could be set in a situation where an external force is influencing Tony's actions. Maybe an enemy has some kind of mind - control device on Tony. So, Tony hits Peter without his true self being in control. Peter then has to figure out what's wrong with Tony and find a way to break the mind - control, all while dealing with the physical and emotional pain of being hit by someone he looks up to.
Another fanfic could be set in an alternate universe where Gotham and New York City are in some sort of alliance. Bruce Wayne and Tony Stark are forced to work together to fight a common enemy that is using both cities' resources for evil. Their different fighting styles and personalities clash at first, but over time they develop a deep respect for each other and become friends.
Good 'tony x bruce fanfic' often has well - developed characters. It stays true to the personalities of Tony and Bruce from the original source. For example, Tony's cocky yet brilliant nature and Bruce's quiet, intellectual side. Also, a strong plot is important. It could be about them working together on a scientific project or dealing with emotional issues within their relationship.
One popular 'tony x bruce fanfic' is 'Heartbeats in the Tower'. It beautifully portrays their relationship development within the Avengers Tower. Another great one is 'Shared Secrets', which delves into their hidden feelings and mutual understanding. There's also 'Technological and Scientific Bonds' that focuses on how their respective fields of expertise bring them closer together.