It depends. Using all caps sparingly for emphasis or in certain special cases might be okay, but using them frequently can be seen as shouting and might come across as unprofessional.
Well, 'caps psychology fanfic' could be about exploring the psychological aspects of characters in a story where 'caps' might refer to some sort of characters with capes perhaps, like superheroes. It could delve into their motives, fears, and how their minds work in different situations.
Madam Jin was a Chinese wedding photography company founded in 1989. With the slogan "A rare lover", Madam Jin was committed to building a chain brand in the Chinese wedding dress industry, providing wedding photography, art photography, children's photography and other services. Madam Jin was the first wholly foreign-owned enterprise in Chongqing. It had now expanded to more than 400 stores in 28 provinces (autonomous regions and cities) across the country and had 13000 employees. Madam Jin's business philosophy was "supreme, kind, and beautiful." She was awarded the first "China Famous Brand" in the Chinese photography industry and the iconic brand of the Chinese wedding photography industry. Madam Jin's service quality and brand image were well-known in the industry.
Sure. For example, in a short story about a baseball game. 'CAPS were everywhere in the stadium. The players' CAPS had their team logos on them. The fans were waving their CAPS in excitement as the game reached its climax.'
I don't know for sure as there's not enough information given. But if it's related to superheroes (assuming 'caps' refers to caped heroes), it could be characters like Superman or Batman. They are well - known for having complex psyches that could be explored in a fanfic.