Thanks. I now run a two-step process: first pass reads through all posts and comments to extract patterns, second pass uses those to generate the content. Should be much more representative of your full year now :)
My impression was the same as the poster: it still over-indexes on a couple of recent posts.
Of course, it's possible that we've both been repeating ourselves all year long! I mean, I know I do that, I just think I've ridden more hobby horses than it picked up. :-)
It's fun, though. Thanks for sharing - a couple of my "roasts" gave me a genuine chuckle.