My great discovery growing up was that I wanted to make myself mentally older. When most people are 100 years old and ending their life - and they've learned all the lessons, but don't have the youth to go out and apply them with the energy that's necessary for success; they don't have the time to implement changes based on their wisdom - I'll be mentally hundreds of years old.
I never wanted to "act my age". I always strived to be "wise beyond my years."
I wanted to start at mentally 100, so I could start out my life where other people are forced to stop; I would get the lessons learned at the very end at the beginning, and carry them to the fullest natural progression.
I've always wanted people to tell me I'm like a 75 year old woman. That would mean I was getting close to the start.