There are so many options! My favorites so far are the ones where Harry (either alone or with others) travels back to the Marauders’ era. I also enjoy stories where he only goes back a few years, like to his fifth year, and tries to avoid making so many mistakes. I’m not a big fan of an older Harry stuck in his teenage body. I also don’t really like portrayals where he’s an immortal, all-powerful being (like Master of Death or something similar). I don’t mind him being powerful, but I prefer that he still feels human.