When I was a kid you really only had a few choices when it came time to dress up in costume. Batman, Superman, Frankenstein, etc.
Today, kids can dress like Bernie Madoff if they want to.
What was my secret desire? Who, if I could have, would I have dressed up as?
No debate: The Flash. The coolest thing about him was when he opened his ring and his Flash costume would come unfolding out. That and the wings on his costume.
Who knew back then that he was based on Mercury or Hermes (depending on which myth you like). All I knew is that he had a cool costume and could run like the wind.
Who knew he would someday end up with Wonder Woman. Who knew?