Probably transforming, that way, if I ever needed a certain power, I could transform into something with that power, which basically gives me access to all superpowers. My arch enemy wouldn't have superpowers, they'd be a non-powered arch-enemy, like The Joker or Lex Luthor.
It was at a wrestling tournament. Me and her brother were both on the wrestling team, and it was our home tournament, and she and her best friend had come to support our wrestling team(and get community service hours) by helping in the kitchen. I was crushing pretty hard on her best friend at the time, and the two of them would occasionally come to the gym to watch the matches, and I went over and talked to them when they did(mainly as an excuse to talk to her best friend).