Well, for Neon Genesis Evangelion OC fanfiction, you could focus on an OC that has a special connection to one of the existing characters. For example, an OC who is a long - lost relative of Shinji. This would bring a whole new dynamic to the story as they interact with Shinji and the others. Or an OC that is a foreign exchange student who gets involved in the NERV operations by accident. They could offer a fresh perspective on the whole Evangelion concept. And don't forget about an OC who is a hacker trying to uncover the secrets of NERV from the outside, which could lead to some really exciting plot twists.
Give your OC a distinct personality. For example, if most characters in Evangelion are serious, make your OC humorous. Also, a unique appearance helps. Maybe your OC has a very different hairstyle or wears unusual clothes. And a special power or ability related to the Evangelion world, like being able to communicate with the Evas in a non - traditional way.
Perhaps. The Evangelion fandom is known for its active participation in creating and consuming fan works. 'evangelion the one i love is fanfiction' could be popular if it manages to resonate with the fans' emotions and expectations. For example, if it delves deep into the complex psychological aspects of the characters, similar to the original series, it might gain a following. Also, if it provides a fresh perspective on the love stories within the Evangelion universe, it could attract a lot of readers.
In general, the Evangelion mangas are considered good. They expand on the anime's universe, providing more depth and character development. However, it depends on personal preferences as some might find the style or pacing not to their liking.