I went to my last Convention in 2006, I had partially woken up then, and decided for the same reason as you Tonus , that the numb-bum and total boredom was not worth the effort, ever again.
The funny thing was, nobody noticed we were not there ! family and fellow J.W's just assumed we were, and hadn't seen us. We had not missed a convention for all our lives previously.
In 2007, I woke up fully to the the fact that J.W teaching and unique Doctrines were all false, and left for good on the 23rd March 2008. I walked out of the K.H, looked back at it knowing I would never go back, but with some regret, as I was leaving life-long friends, and my family were all in.
But I could no longer be part of a religion that taught Lies as Truth.