Fanfics love twisting canon, and Midoriya's villain arc is one of those juicy what-ifs that just sticks. Imagine this kid, crushed under the weight of being quirkless, but instead of meeting All Might, he snaps—maybe society rejects him harder, or someone manipulates his desperation. There's a ton of fics where AFO gets to him first, whispering about power being the only thing that matters. Others go darker, like 'Yesterday Upon the Stair,' where grief warps his heroism into something vengeful. What fascinates me is how writers explore his moral core breaking differently—some make it tragic, others downright chilling.
Personally, I adore fics that keep his analytical mind intact but flip it toward villainy. Like, he still strategizes like a hero but for the 'wrong' side. It's way more compelling than edgy-for-no-reason takes. Also, the contrast between his canon kindness and fanfic ruthlessness? Chef's kiss. Makes you wonder how thin the line between hero and villain really is in that world.