So... The question is pretty straightforward. Which Quirk do you want and why? And what would you use it for? And/or would you be in this world? A hero? A villain? A mercenary? Or maybe just a civillian?
Personally I´d want "All For One". I´d be a villain acting like a hero, slowly stealing every and any ability that I can get my hands on. And then I´d destroy the future generation of superheroes. Leaving a huge gap in the hero system, throwing it into chaos. People loosing their faith in the heroes, parents and civiallians going mad with despair about their family being dead. I´d be the number one threat to the entire world.