i don't know what this data set is showing sociologically. it's just a scrape of data and not very well presented. that said, nice project but go on and give it something else.
It’s a classification. It’d be interesting to see the size of the different subreddits too (number of subscribers and number of threads/replies/posts).
Just to give another opinion, I thought it was very neatly categorized and the tree view was a great way to show it.
This. And it's not even original research. Seems HN is just drooling over anything code & nsfw at random.