If religion or abuse comes up in conversation, I bring it up. But I don't really announce it. Mostly because although the WTS has caused so much damage, it is NOT the most important thing in my life. It does not define COMPLETELY who I am. I've had several years of other things in my life that round me out, even without that experience.
But when I'm asked to share, I'm happy to do it. Just two weeks ago, I gave my "testimony" to my Sunday School class. It went well, but it was still emotional for me to share it. When I voice my experience as a JW, it's an effort to educate people on the dangers of a cult, not to create a pity party for what I've experienced. It's always embarrassing to me when people get all sad over what I've been through. I don't want them to be sad. I want them to be happy for me. They don't seem to understand the thrill of having escaped!