The thread I'm most proud of is the short lived C&M Media Timeline (r.i.p, we hardly knew ye), a chronicle of what events the members of PokeCommunity felt was important in the world of media and what not. The release of Thriller, CNN being created, the death of Amy Winehouse etc. I loved it, but only a few other members did and after a month or two of no posts in the thread, but still with an impressive amount of submissions beforehand, I sent a PM to Jon asking him to expunge the thread's existence from the forum. With tears in our eyes, our failed lovechild was derezzed and destroyed. It was a truly great thread; unappreciated by those who should have worshipped it's existence.
I can't remember off the top of my head which thread of mine has the most replies/views, but I remember the original Accent Challenge garnering a quite impressive amount of views and replies,l something that every other incarnation of that thread has not been able to topple. Sorry, droomph! Your version of the Accent Challenge was just destined to fail! Upon checking as I typed this post, my thread had 57 replies and over 3000 views. Well done, I guess!