For me, it was exactly 4 years ago. I was caught playing "we wish you a merry christmas" with my wind band and DEMANDED by 2 elders to choose between "Jehovah's organisation" and "my music" with it's worldy members and "pagan works". Even if I would choose to remain in the organisation, I would be "helped for several months" to understand how serious my sin was...
When I left them, I knew I would never be back ! I wrote them a lettre who was not to dissociate but to explain why I would not attend meetings anymore nor share in the field service. I was very attentive to each word I used and then refused to meet 2 elders ou 1 elder with the "circuit overseer" but I proposed to share a good beer with an INDIVIDUAL elder, as friends for 30 years and have a conversation from man to man... THEY refused !
No regret !