What are the most popular topics in the Threadiverse?

Please answer with a single option per comment without duplicating and upvote the topics you've seen active.

I've discovered the keyword filter and I want to know what's out there. Although I doubt the filter will work in topics I at least can try and figure out some keywords usually used in those communities.

The polls don't allow users to add their own options so I had to do it this way.