Which fandoms have the best character creation options?

Hey all, I'm looking to write an original fic but also want to do a fanfic in the background. I'm looking for Canon-lore punctual but character-created focused fics. I'm not a huge shipper, I love the world and the characters. I don't care about pairings. <br><br>I've already explored Star Trek, Harry Potter, and Supernatural. <br><br>Which fandoms have complex, interesting character creation options and a good amount of canon lore to play with? I love magic, sci-fi, fantasy, paranormal, and horror.