This one is easy for me, but may catch you off guard...
Leonardo da Vinci
He was an engineer and an artist. I want to be just like him someday. Except female. And really only in the art and engineering way... no other way. Did you know that he taught himself to write cursive backwards so that no one could read his work?! They only discovered this was so when someone held it up to a mirror. How cool is that? Seriously.
And someday I want to go to Paris and see the Mona Lisa, but that's unrelated to this post and more relevant to the last one.