I have the same problem. I taught myself marketing, then design, and enough code to throw together decent web pages. I've written a novel, then decided it wasn't good enough and shelved it. I taught myself how to play the guitar, then how to produce music.

This can feel like bragging but I really feel that I haven't really specialized in anything. Although being a marketing consultant has been my livelihood for nearly a decade, I'm somehow not able to call myself a marketer.

I'm turning 30 and beginning to wonder if these grand experiments have been stretched too long. And if they have, what do I focus on? And can I even focus on one thing?