hey ning, i don think that this describe you best ...
you will change when time pass, may be this is just your past... :)
don't need to understand yourself best la, i tried before, but i used to change because of environment, because of... because of... because of a lot of unknown elements.... :)

Cheers... just do what you need to do. Your target, your goal also change year by year, month by month, day by day, right?