Another theme is his relationships, like his family relationships. His family often plays an important role in fanfics, as they are a big part of his life in the original story. And of course, there are also romantic relationships explored in many fanfics, whether it's a new character or an existing one from the Blue Beetle universe.
You can start by looking on fanfic websites like Archive of Our Own (AO3). There are often a lot of well - written Blue Beetle Jaime Reyes fanfics there. The tagging system on AO3 makes it easy to search for specific themes or story types you might be interested in.
A lesser - known but really good 'Bart Allen x Jaime Reyes' fanfiction is 'Fast Friends to More'. This one focuses a lot on their day - to - day interactions. How Bart's always zipping around and Jaime's trying to keep up in his own way. It's a more slice - of - life kind of story that gradually delves into their feelings for each other. There are some really cute moments like when Bart tries to understand the technology of the Scarab to impress Jaime.
Bart Allen is often a great character to pair with Jaime Reyes. Their different personalities, with Bart being so fast - paced and Jaime being more methodical, create interesting dynamics in fanfiction. They can have some really fun banter and their combined powers can lead to some exciting plotlines.