NVR. Seriously, upon reflection on your question, I see nothing about my JW past that I should be thankful for. They kept me and my family captive for some 33 years, that was the prime of our lives. We gave them our youth, our strength, our resources. All that time we never realized the past lying history that The Watchtower kept hidden from us. Once we did realize it and came to know that we were captives of an Illusionary concept, it was then that we broke free and said no thanks. The cost of those 33 years cannot be calculated financially, emotionally, psychologically etc.
As far as others feeling that they got something to be thankful for, well, good for them.
Blueblades