I believe my Animal Crossing New Leaf thread is my longest at over 1k posts. I had a few Have you ever threads (1+2) that went to about 500-700 posts. I believe someone else made another have you ever thread that went a few hundred posts after mine.

I think I had a 15 but a lot of mine were ignored.

My Zelda elimination game thread, had about 700 posts

It was hell adding all those up

Something about MK8 not being worth playing.

400+ posts I think.

http://gamrconnect.vgchartz.com/thread.php?id=159902&page=1

Recked :p

Which is why it's so impressive!

My PPD got so high afterwards

I have some decent expectations from my upcoming Flipnote thread as well :P

The Nintendomination thread, with around 14k:

http://gamrconnect.vgchartz.com/thread.php?id=171220&page=1

Aside from that, the Nintendo@E3 thread had around 2,400 posts. The Fire Emblem Awakening thread had around the same figure (2,500), the London 2012 Olympics thread 1,700, Xenoblade 1,600...and I think that's all the ones above 1,000 posts. A few got close, like the 2013 Gamescom thread or the MH3U thread (both around 900 posts), but only those five above the 1k mark.

I had one where I asked which console has the best software ever. PS2 ended up beating out SNES and I think it was a couple hundred posts.

Microsoft E3 2014 Thread 1590 posts

Credit goes to Seece for his huge assistance :)