I've never successfully completed this particular challenge, but I just like the idea of it.
In my defense, it has always caused me to pull some chunksters off the shelf. So once again, I'm signing up for this and being ambitious: I'll do the "Do These Books Make My Butt Look Big?" level, which is committing to read 6 chunksters this year, 2 of 450-550 pages in length, 2 of 551-750 pages in length, and 2 greater than 750 pages. I have plenty of each category on hand, and in fact, I'm reading Wolf Hall right now, which qualifies in the first page length. Let's see what I can do this year!