Ask HN: What are your other interests?

I love reading HN because of the great quality of comments and discussion. I wish there were other similar communities of people maybe focused around different things like history, politics, science, security, music, sports, etc.

For instance, I love history. I would really enjoy a community where something like this[1] could be posted and people could share insights about it.

So my question is, besides software, hardware, and startups, what cool stuff interests you? Is there enough of an interest in this community to perhaps set up a separate site with another focus?

1. https://en.wikipedia.org/wiki/Year_Without_a_Summer