I think I'm seeing your initial question a little differently from everyone else.
I do identify myself as an ex-JW. When I first left it always became inevitable to tell someone new I met early on that I used to be a Witness. I found it hard to talk about any part of my life, whether it was not attending public high school cuz my parents wouldn't let me go to college cuz I needed to pioneer instead, or why I got excited as a 5 year old when celebrating my first Christmas or Halloween, or to explain why I had married one month after my 18th birthday, or to explain why my family wasn't in my life, without prefacing it that I was once a JW.
I tried for awhile to consciously try not to bring up the fact that I was an ex-JW. I actually yearned for that to not determine the boundaries of who I am as a human being. But I learned that it gave me a comfortable seat to sit in while meeting someone new. People are always fascinated about my life and the dynamics of my family relationships because of the Borg. It became an easy ice-breaker for conversation.
A second thing it did, and probably much more importantly...every time I would recount my story to someone new, I would always receive commendations and praise for my courage and strength for what I had gone through. It served to strengthen me in return and move me to continue my resolve to never get depressed (for too long anyway) over my situation but rather to savor my freedom and feel proud of myself for making decisions that I don't think my parents are brave enough to make. Getting that reaffirmation so early one when I had noone was so needed and helpful.
I have often wondered how long I will continue to use this to define me. I've only been out 3 1/2 years so I'm still racking up experiences and memories of my new life that will eventualy define me more accurately. But no matter where I go or how much I change, the simple fact will be that I will always be considered and consider myself an ex-JW. It makes up the largest part of who I am. Not the strongest part, but the largest part. Seeing people advidly post on the forum who have been out 20-30 years, tells me this might always be the case to some degree.
Each new experience that stands in such direct contrast to my old JW self is exemplified and becomes even more important because of that old life. I savor those things more so because I haven't always had those freedoms.
So instead of feeling bad or weak in some way for defining the base of who I am on the seemingly negative of being an ex-JW...I focus in on the positives of the person I've become and continue to grow to be because of the lessons I've learned since leaving that life. Thus saying proudly that I am an ex-JW shows just how far I've come. And that's awesome!!!
My 2 cents...
Shauna