You guys are taking up all the good ones!
Well, some of these might sound repetitive, but here it is:

I wanna be:

a drummer
a violinist
a better singer
a swing dancer
a snowboarder
a world traveler
multilingual
finished with school
a boyfriend
a husband
a father
a grandfather
a better programmer
a Linux freak
a Yankees fan in Fenway Park
an Ashaman
a Maiar
a Jedi Master
Q

I know I'll think of more after I post this...