[noamyoungerm]

I'm not sure whether the distinction between sub-categories and their parents was treated correctly in this analysis. There is a huge gap between the popularity of HTML and HTML5, CSS and CSS3, and Javascript and its assorted heap of technologies.

My guess is that if you like HTML, you will mark yourself as liking both HTML and HTML5. However, it would be odd to like one and not the other, and pointless to dislike them both.

In that case, it might be more correct to count people who liked/disliked at least one of HTML or HTML5 as being HTML-positive/negative people, but I am not sure that this won't distort the data in some other way.