The most interesting part is the combination of two different and exciting concepts. Percy Jackson's world is full of Greek mythology and adventure, while Boosted Gear brings in a unique power - up system. When combined, it creates a whole new set of possibilities for the story.
One popular Percy Jackson Boosted Gear fanfiction is 'The Demigod's New Gear' on FanFiction.net. It combines the elements of the Percy Jackson universe with the unique concept of Boosted Gear in an interesting way.
One great 'Oc Boosted Gear Fanfiction' is 'The Ascent of the New Gear User'. It has an interesting plot where the OC discovers unique powers of the Boosted Gear. Another is 'Oc in the Boosted Gear World', which focuses on how the OC adapts to the dangerous world filled with Devils and Angels. And 'A New Dawn for the Boosted Gear Oc' shows the OC's journey to become a powerful force in the Boosted Gear universe.
A unique OC concept makes it interesting. For example, an OC with a special backstory related to the Boosted Gear, like being from a long - lost family that once had a connection to it. Also, exciting power - up scenarios. When the OC discovers new and unexpected ways to use the Boosted Gear's power, it keeps readers hooked.
There might be new antagonists created specifically for this fanfiction. They could be characters who are after the boosted gear for their own evil purposes. Maybe they want to use it to take over the ninja world or something. These new antagonists would likely have their own unique powers and abilities that would make them a challenge for Naruto and his friends.
It could be Orochimaru. He might be interested in the Boosted Gear's power and try to steal it from Naruto. He has always been after powerful artifacts and new sources of power, so the Boosted Gear would be a great target for him.
One popular story could be 'Izuku's Ascent with the Boosted Gear'. It might focus on how Izuku discovers and masters the power of the Boosted Gear in a unique My Hero Academia - inspired universe. Another could be 'Izuku and the Boosted Gear: A New Alliance' where he forms new relationships while using this power.
Well, AO3 is a great place to start. It has a really good search function. You can type in 'izuku boosted gear' and it will show you all the relevant stories. Some of them might be sorted by popularity or by the date they were last updated. FanFiction.net is also worth checking out. There are often communities on these sites that are dedicated to My Hero Academia fanfiction, and you can ask for recommendations within those groups.
One interesting Naruto Boosted Gear fanfiction could be about Naruto obtaining the Boosted Gear and using its power to face new and stronger enemies in the Naruto universe. For example, he might use it to take on a powerful Akatsuki member in a unique way.
In a Boosted Gear Crossover Fanfiction, characters such as Light Yagami from Death Note could be included. He could use his intelligence in a world with the Boosted Gear, creating a complex power struggle. Also, characters like Edward Elric from Fullmetal Alchemist. His knowledge of alchemy could interact in interesting ways with the Boosted Gear. Additionally, characters like Mikasa from Attack on Titan, with her combat skills, would be great in a crossover.