Who am I?

I feel as though I've been so many people in this lifetime.  So, who am I? - does that sound crazy to you?  I was browsing the bookstore with my oldest son yesterday.  We were near the graphic novel section; a section that normally would not be of any interest to me.  There sat a book that caught my eye.  Marbles by Ellen Forney.  Why it caught my eye - I have no idea, but I opened it up.  There was an illustration that just caught my attention and I started to read.  The book is about the author's discovery/diagnosis of Bi-polar and her journey to wellness (well I have about a third left to read but it appears wellness is on the horizon). Last night I could not stop reading here are some things that I need to chew on and can relate to:

*family history

*periods of lifting/highs

(creativity/excitement/can do anything)

*periods of depression

(withdrawing from the world)

I was just struck by some of the similarities... and of course there was swimming, triathlon, art, expression, randomness... 

What?

Hm.