Just wanted to add a little followup to this thread. Just finished reading The Renaissance Soul (thanks again for the tip) and was very happy with the book. It rang very true for me and had lots of good advice. It actually made me feel better about myself. I took a while to read it, as I did most of the exercises in it.
I would highly recomend it to anyone with too many interests.
The book got me thinking about purpose in life. I messed around with the idea from Steve's article about finding your purpose in 20 min last year, without much success. Maybe it was because, as a renaissance soul, I have several purposes, and may very well have purposes that don't last me my whole life. So finding my true purpose in life, may simply not be right for me.