To borrow from and paraphrase Merlin Mann hopefully accurately, you are what you actually do, not what you think or wish that you did. So far, in 2013, I’m really a writer and podcaster and, to an embarrassing degree, a Twitter user with a programming hobby.
In the past year I”ve run into many people who are doing “A” but want to do “B” (e.g. web developers who are “native mobile developer wannabes”).
Read Marco”s article. Also read Matt”s essay that Marco mentions: http://mattgemmell.com/2013/06/06/legacy/
If you”re not doing what you want to do take a second and stop and ask yourself “why?”.