See the post on "Shakespeare in Doubt" for one major existential crisis. See the post on the death of Elizabeth McKenney for another.
"Analytics" is the term used for the statistics provided about who is reading the blog. I have my doubts about the accuracy of these numbers, for a variety of reasons. We are slowly building a daily audience it seems. It may not be coincidence that the two posts with the highest read count (e.g. the count that each post gets when someone goes directly to that post rather than just reading the blog in general from front to back) are the TRW / Robert Abel post and the Josh Pines Job Interview post. Both of these were "marketed" by mentioning them on Facebook which seems to have increased the audience to the right people as well as generating good comments (on Facebook, comments will have to be moved over by hand, I think).